Dongting Lake, formerly known as Yunmeng, Jiujiang, Chonghu, is located on the south bank of Jingjiang River in the middle of the Yangtze River, across Yueyang, Guluo, Xiangyin, Wangcheng, Yiyang, Lijiang, Hanshou, Changde, Jinshi, Anxiang, Nanxian. The name of Dongting Lake began in the Spring and Autumn Warring States period, and was named after Dongting Mountain (now Junshan) in Dongting Lake. Hubei Dongting accepts the water of the Yangtze River Songzi Port, Taiping Port, Dianchi Port and Tuning Port, and the small tributary of the Xiangjiang River, Lijiang River, Lijiang River, Lijiang River and Milo River in the south, and enters the Yangtze River from Chenglingji, Yueyang City. Dongting Lake is anciently known as "800 miles Dongting". In the late 1990s, according to the calculation of the water conservancy department, there was an area of 2579.2 square kilometers (2740 square kilometers), commonly known as China's second largest freshwater lake; If the river area of Hunan, Resources, the Lijiang River and the "Four mouths of the Yangtze River" is more than 1,300 square kilometers (1,878 square kilometers), the total area of the two is 3879.2 square kilometers (4,040 square kilometers). The circumference of the lake basin is803.2 kilometers, with a total volume of 22 billion cubic meters, of which 17.8 billion cubic meters of natural lakes and 4.2 billion cubic meters of river channels.