Policemen work at Longnan Railway Station in Longnan, northwest China's Gansu Province, Nov. 30, 2016. The Minxian-Guangyuan section of Lanzhou-Chongqing railway line will be put into operation on Dec. 26. (Xinhua/Chen Bin)
Policemen work at Longnan Railway Station in Longnan, northwest China's Gansu Province, Nov. 30, 2016. The Minxian-Guangyuan section of Lanzhou-Chongqing railway line will be put into operation on Dec. 26. (Xinhua/Chen Bin)