Train attendants prepare to board at Nanjing Station, east China's Jiangsu Province, Nov. 10, 2015. Starting from Jan. 9, 2016 at 0 o'clock, the new railway operation diagram will take effect. The number of high-speed trains will be 1980.5 pairs, which accounts for more than 60 percent of all trains. (Photo: Xinhua/Su Yang)
