It is the largest and longest river in Changning City.
The Yi River rises in Xiaoyangquan (Chinese: 小洋泉) of Baishui Township (Chinese: 白水乡) of Guiyang County.
Its main stream runs generally south to north and joins the Xiang at Jiangkoutang (Chinese: 江口塘) of Xinhe Town (Chinese: 新河镇).
The Yi River has a length of 86 kilometres (53 mi), with its tributaries, and its drainage basin covers an area of 1,056 square kilometres (408 sq mi).
This article related to a river in China is a stub.