Mingjiang: Also known as Yingjiang, it was called water invasion in the Western Han Dynasty and the Eastern Jin Dynasty, and green water in the Qing Dynasty. 1 Yujiang tributary, a tributary of the Xijiang River in the Pearl River system, is the largest tributary on the south bank of the upper reaches of Zuojiang River. Originated in Wujunguan, Shangsi County, it is located in the north of Shiwan Mountain. It flows through Shangsi County, Ningming County and Longzhou County and flows into Zuojiang River. The total length is 3 15km, and the drainage area is 644 1km2. It is called Little Three Gorges, Little Wuxia and Small Guilin. Its tributaries are Gongan River, Sizhou River and&; #9 1; Pu & amp # 93& amp#9 1; Earth and 93. Xiahe River and Pailian River. In addition, there are underground rivers in Liangting Township. The Mingjiang River system spans the western part of Shangsi and Fangcheng counties and the whole territory of Ningming County. The middle and upper reaches are hilly areas, and the lower reaches are sloping basins with a drainage area of 644 1 km2. The total amount of water injected into Zuojiang River every year is about 4 billion cubic meters, accounting for about a quarter of the water inflow from Zuojiang River, and it is the largest tributary of Zuojiang River.