Introduction to the source of Fenhe River: The source of Fenhe River is located about 1 km northwest of Dongzhai Town, Ningwu County. The source is a pond. On the stone wall of the pond, there are four large characters "Fenyuan Lingmarsh" engraved on it. "There is a dragon head carved in the stone wall, and a clear spring spurts out from the dragon's mouth, flowing all year round. There was originally a Leiming Temple nearby, but it was later destroyed.