Railway staff members work at a maintenance base in Shijiazhuang, north China's Hebei province, Feb. 1, 2021. The Shijiazhuang section of China Railway Beijing Bureau Group Co., Ltd. has carried out maintenance work for trains to prepare for the country's annual Spring Festival travel rush. (Xinhua/Jin Haoyuan)

Railway staff members check the battery of locomotives at a maintenance base in Shijiazhuang, north China's Hebei province, Feb. 1, 2021. The Shijiazhuang section of China Railway Beijing Bureau Group Co., Ltd. has carried out maintenance work for trains to prepare for the country's annual Spring Festival travel rush. (Xinhua/Jin Haoyuan)

A railway staff member works at a maintenance base in Shijiazhuang, north China's Hebei province, Feb. 1, 2021. The Shijiazhuang section of China Railway Beijing Bureau Group Co., Ltd. has carried out maintenance work for trains to prepare for the country's annual Spring Festival travel rush. (Xinhua/Jin Haoyuan)