A driver works on board the bullet train 55252 for a test run on a high-speed railway linking Xi'an, capital of northwest China's Shaanxi Province, with Chengdu, capital of southwest China's Sichuan Province, Nov. 22, 2017. The first full-course test run was carried out Wednesday on the Xi'an-Chengdu high-speed railway, which is scheduled to enter operation within the year. The 643-km line is China's first rail route to run through the Qinling Mountains. With a designed speed of 250 km per hour, it will slash the travel time between the two cities from the previous 16 hours to 3 hours. (Xinhua/Zhang Cheng)