Baoziwan Township, Xinrong District. Yinma River passes through Datong City from north to south via Xinrong District and finally flows into Sanggan River. Overview of the main stream Yinma River originated in Fengzhen, Inner Mongolia, and passed through Datong City from north to south and finally merged into Sanggan River. It is called Yinma River in the north of Gushan Village and Yuhe River in the south, and most of its reach is in Baoziwan Township, Xinrong District.