Chengdu-Ya'an high-speed railway starts operation

A passenger prepares to get on board a bullet train of Chengdu-Ya'an high-speed railway at Chengdu West station in Chengdu, capital of southwest China's Sichuan Province, on Dec. 28, 2018. The newly-built Chengdu-Ya'an railway started operation on Friday. (Xinhua/Xue Yubin)