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Workers work at the construction site of Hanzhong Railway Station of Xi'an-Chengdu Passenger Railway in Hanzhong, northwest China's Shaanxi Province, May. 11, 2017. The 643-km line is China's first rail route to run through the Qinling Mountains. With a designed speed of 250 km per hour, it will slash the travel time between the two cities from the previous 16 hours. (Xinhua/Tao Ming)