LHASA, July 7, 2016 (Xinhua) -- Passengers are seen on a train from Lhasa to Xigaze, southwest China's Tibet Autonomous Region, Jan. 24, 2016. The quantity of pilgrims by train from Sichuan, Gansu and Qinghai provinces to Lhasa increased year by year as China's Qinghai-Tibet Railway opened on July 1, 2006. (Xinhua/Jigme Dorje)