A train running on Lanzhou-Chongqing line leaves a railway station in Southwest China’s Chongqing Municipality, Sept. 29, 2017. Lanzhou-Chongqing railway, a major railway connecting Lanzhou City in Gansu Province with the southwestern metropolis Chongqing, fully opens to traffic on Friday. The railway, which started construction in 2008, also runs through northwest China's Shaanxi Province and southwest China's Sichuan Province. It will play a crucial role in improving transportation efficiency and advance the development program for western China. (Photo: China News Service/Chen Chao)
