Lijiang River is a first-class tributary of Huaihe River in the Yangtze River system, and also a first-class tributary of Heying Branch of Liusha River. Because it comes from a mountain stream, it is clear and sweet, hence the name. It was called Lishui in ancient times. 1 Together with its superior Shahe, it is often called Shali River. Its main tributaries are all in Henan Province. Originating from Lishugou in the northwest of Silidian Village (nanzhao county Laolushan 2) in Fangcheng County, it flows through Yexian County and Wuyang County and enters Shahe River in the west of Luohe City, with a total length of163km and a drainage area of 2,787km2. The average riverbed gradient is about 1/3000. The upper reaches of Lijiang River are the rainstorm centers of Funiu Mountain, mostly mountainous areas. Historical floods are serious, and there are many reservoirs and flood control facilities such as Gushitan. There are many tributaries of Lijiang River, and the dry season is its biggest tributary.