A test bullet train running in a trial operation of the Baoji-Lanzhou high-speed railway arrives at the Lanzhouxi Railway Station in Lanzhou, capital of northwest China's Gansu Province, June 2, 2017. The 401-km railway linking Baoji of northwest China's Shaanxi Province and Lanzhou in neighboring Gansu Province started test runs of the whole line.

A technician monitors the data on a test bullet train running in a trial operation of the Baoji-Lanzhou high-speed railway, June 2, 2017. The 401-km railway linking Baoji of northwest China's Shaanxi Province and Lanzhou in neighboring Gansu Province started test runs of the whole line. (Xinhua/Li Yibo)

Staff member work on a test bullet train running in a trial operation of the Baoji-Lanzhou high-speed railway, June 2, 2017. The 401-km railway linking Baoji of northwest China's Shaanxi Province and Lanzhou in neighboring Gansu Province started test runs of the whole line. (Xinhua/Nie Jianjiang)

A conductor gets off a test bullet train in a trial operation of the Baoji-Lanzhou high-speed railway at the Baojinan Railway Station in Baoji, northwest China's Shaanxi Province, June 2, 2017. The 401-km railway linking Baoji of northwest China's Shaanxi Province and Lanzhou in neighboring Gansu Province started test runs of the whole line. (Xinhua/Li Yibo)