A driver checks the operation of instruments before departure at Guiyang North Railway Station in Guiyang, southwest China's Guizhou Province, Jan. 25, 2018. A railway connecting Chongqing and Guiyang, two major cities in southwest China opened on Thursday. Designed for passenger trains running at a speed of 200 km per hour, the 347-km railway will improve traffic between China's southwest and the rest of the country. (Xinhua/Ou Dongqu)