A girl takes a selfie in front of a train at Wanzhou North Railway Station in Chongqing, southwest China, Nov. 7, 2016. The Wanzhou-Chongqing section of Zhengzhou-Chongqing high-speed railway line started a simulation operation on Monday. The 247-kilometer-long section, designed with a speed of 250 km per hour, will be put into operation within this year. (Xinhua/Liu Chan)