The Qinghai-Tibet Railway is the highest and longest plateau railway in the world, with a total length of 1, 956 kilometers, of which 960 kilometers are over 4,000 meters above the sea level. It is the first railway connecting Tibet with the rest of China. As the railway travels through the most fragile ecosystem in the world, ecological protection measures have been taken during and after the construction to ensure that it becomes a “green railway “. The Qinghai-Tibet Railway has greatly shortened the travel time to Tibet. More importantly, it has greatly promoted the economic development of Tibet and improved the life of local residents. Since the opening of the railway, more and more people have chosen to travel to Tibet by train so that they will have the opportunity to enjoy the beautiful scenery along the route.