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　　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, will fully open to traffic on Sept. 29, 2017, according to a press conference held by Lanzhou Railway Bureau Thursday. 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/Liu Kun)