Passengers get off a low-speed green train at the Jiangjin Railway Station in Jiangjin, southwest China's Chongqing Municipality, Jan. 31, 2019. Low-speed green trains are still in operation as bullet trains run past new stations throughout China. The old-fashioned green trains are a low-cost alternative for people to travel during the 2019 Spring Festival travel rush. (Xinhua/Liu Chan)