This combo photo shows train driver Zhang Xin working in a locomotive in southwest China's Guizhou Province, Feb. 5, 2004 (top, photo taken by Hou Shaohua); and bullet train driver Zhou Li working during a mission on the Beijing-Tianjin high-speed railway in north China, Jan. 25, 2017 (bottom, photo taken by Yang Baosen). (Xinhua)
