A high-speed train for a joint test of Xi'an-Chengdu Passenger Railway is seen at Xi'an north railway station in Xi'an, capital of northwest China's Shaanxi Province, June 20, 2017. The Xi'an-Chengdu Passenger Railway, the first high-speed railway travelling through the Qinling Mountains with projected speed of 250 kilometers per hour, will undergo a joint test since Tuesday in its Shaanxi section. (Xinhua/Li Yibo)
