The Qinghai-Tibet Railway, known as the "Road to Heaven", connects Tibet with the outside world, and the people who travel by train are tourists, workers, householders, pilgrims, etc. In fact, traveling to Tibet by train is not an easy task; you not only have to endure the test of sitting for a long time on the train, but also deal with the discomfort that high altitudes bring to people. However, mysterious Tibet is like a dream that people want to fulfill, and they make this journey by the light of the stars.