A five-year-old girl from Lhasa takes a train on Lhasa-Shigatse railway line, southwest China's Tibet Autonomous Region, Aug. 1, 2015. As the first extention line of Qinghai-Tibet railway on the world's highest plateau, Lhasa-Shigatse railway shortens the traveling time from Lhasa to Shigatse to three hours. [Photo/Xinhua]

An aid-Tibet worker travels to Xigaze with his son on Lhasa-Shigatse railway line, southwest China's Tibet Autonomous Region, Aug. 1, 2015. As the first extention line of Qinghai-Tibet railway on the world's highest plateau, Lhasa-Shigatse railway shortens the traveling time from Lhasa to Shigatse to three hours. [Photo/Xinhua]

Photo taken on Aug. 1, 2015 shows a view of Xigaze railway station in Shigatse, southwest China's Tibet Autonomous Region, Aug. 1, 2015. As the first extention line of Qinghai-Tibet railway on the world's highest plateau, Lhasa-Shigatse railway shortens the traveling time from Lhasa to Shigatse to three hours. [Photo/Xinhua]

                                                                                                                             Editor: Lily Li