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2019-10-22 17:32:13

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  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

  World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)World's highest highway tunnel open to traffic#标题分割#AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)AerialphotoshowstheMilaMountainTunnelinSouthwestChina'sTibetautonomousregion,April26,2019.Theworld'shighesthighwaytunnelwasopentotrafficonFridayatanaltitudeofover4,750metersabovesealevelinSouthwestChina'sTibetautonomousregion.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)MilaMountainTunnelopenstotrafficinSouthwestChina'sTibetautonomousregion,April26,2019.(Photo/Xinhua)

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