Machinists check a bullet train at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018. The Chongqing West bullet train application was put into official use on July 18.[Photo/Xinhua]
Machinists walk at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018. [Photo/Xinhua]
Machinists walk at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018. [Photo/Xinhua]
A staff member introduces the operation of managing center at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018.[Photo/Xinhua]
Machinists check the bottom of a bullet train at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018.[Photo/Xinhua]
Machinists walk at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018. [Photo/Xinhua]
A machinist checks a bullet train at the Chongqing West bullet train application in Chongqing, Southwest China, July 18, 2018. [Photo/Xinhua]