It is part of the East China Sea basin as a headwater of the Gan River, which itself is a tributary of the Yangtze.

The average flow of the river is 700 cubic meters per second (25,000 cu ft/s).

The river basin of the river extends between longitudes 114° 48′–116° 08′ and latitudes 24° 38′–26° 43 ′ N. The climate is of the humid subtropical climate type with rainfall concentrated in the summer (between April and September).

The watershed is mainly occupied by hills and small mountains.

This is one of the regions of southern China most affected by erosion phenomena associated with human activities (destruction of forests, cultivation of soils and opening of mines and quarries).