A train attendant offers a toy panda to the first passengers of the Chengdu-Ya'an Railway at Chengdu West Railway Station in Sichuan province on Friday. The 140-kilometer railway, designed with a maximum speed of 200 km/h, will also serve as part of the envisioned Sichuan-Tibet Railway. [Photo by Wang Huan/Provided to China Daily]

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. [Photo/Xinhua]

A person dressed as giant panda interacts with passengers on the bullet train C6651 of high-speed Chengdu-Ya'an railway on Dec 28, 2018. The newly-built Chengdu-Ya'an railway started operation on Friday. [Photo/Xinhua]

The train conductors pose for photos before the bullet train of Chengdu-Ya'an high-speed railway at Ya'an station in Ya'an, southwest China's Sichuan province, on Dec 28, 2018. The newly-built Chengdu-Ya'an railway started operation on Friday. [Photo/Xinhua]