Tōngwèi

Tongwei lies in the hills north of the Wei River in eastern Gansu. Its name recalls a route along the Niugu River toward the Wei. During the Song's campaigns on the western frontier, the commander Yang Wenguang built a fort in the Chazhu valley in 1068, and the court named it Tongwei. The Jin later established a county in the district. In 1369, as Ming armies advanced into the northwest, the local Yuan official surrendered to their commander, bringing Tongwei under the new dynasty.