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Photo taken on Sept. 20, 2017 shows the construction site of Epanggong Railway Station in Xi'an, capital of northwest China's Shaanxi Province. The 643-km Xi'an-Chengdu Passenger Railway 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/Tang Zhenjiang)