Milestones in China's high-speed railway development

Photo taken on Sept. 18, 2017 shows a train running on Lanzhou-Chongqing railway, in the Guangyuan section within southwest China's Sichuan Province. Lanzhou-Chongqing railway, a major railway connecting Lanzhou City in northwestern province of Gansu with the southwestern metropolis Chongqing, opened to traffic on Sept. 29, 2017. 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. (Xinhua/Fan Peishen)