In January 1967, due to "preparation, preparation for disasters", and concerns that Tianjin would become a battlefield, Hebei Province repatriated the provincial capital to Baoding, and the CCP Central Committee decided that Tianjin should be restored to the central municipality and remain so far. In April 1970, in the event that the Central Government had applied for funding for the construction of the subway, the Tianjin Municipal Government decided to raise funds on its own to establish the project on the basis of the name of the channel, and build it on the basis of the old walled river. In July 1973, five counties including Jixian, Baodi, Wuqing, Jinghai, and Ninghe were formally placed under the jurisdiction of Tianjin.