Zengjiang is in the east of Guangzhou. Originated in Qixingling of Xinfeng County, it flows through Conghua, Longmen, Zengcheng and other counties and cities. Inject Dongjiang into Zengcheng Guanhaikou. It is 189 km long, with a drainage area of 3 144 km2. The main reach is in Zengcheng.

The Pearl River is formed by the confluence of the East River and the West River, so Zengjiang is a tributary of the Pearl River!