China Railway is divided into regional headquarters according to its positioning in the country, and the northwest regional headquarters is in charge of Shaanxi, Ningxia, Qinghai and Xinjiang, and is responsible for the operation and production in these areas. Mainly responsible for strategic affairs such as project contracting, coordination and regional operation in northwest China. But not directly involved in the project construction, all engineering bureaus and other subsidiaries must obey the regional command.