Staff workers check the bottom of a locomotive in Xiangyang, central China's Hubei Province, Jan. 16, 2018. Local railway staff checked some 400 locomotives of Wuhan railway bureau to ensure the safety during the upcoming Spring Festival travel rush. (Xinhua/Yang Dong)

Staff workers maintain the connection system of a locomotive in Xiangyang, central China's Hubei Province, Jan. 16, 2018. Local railway staff checked some 400 locomotives of Wuhan railway bureau to ensure the safety during the upcoming Spring Festival travel rush. (Xinhua/Yang Dong)

A staff worker maintains the brake system of a locomotive in Xiangyang, central China's Hubei Province, Jan. 16, 2018. Local railway staff checked some 400 locomotives of Wuhan railway bureau to ensure the safety during the upcoming Spring Festival travel rush. (Xinhua/Yang Dong)

Staff workers maintain locomotives in Xiangyang, central China's Hubei Province, Jan. 16, 2018. Local railway staff checked some 400 locomotives of Wuhan railway bureau to ensure the safety during the upcoming Spring Festival travel rush. (Xinhua/Yang Dong)