Dongting Lake is the largest river in Hunan Province, which lies in the Xiangjiang River and the Yangtze River. There are four explanations for the source of Xiangjiang River: First, the traditional positive source (commonly known as Dongyuan) is the stone ladder in Baishi Township, Xing 'an City, Guangxi Zhuang Autonomous Region, and the source is Ocean River, which flows northward into Xing 'an Fenshui Reservoir and flows into Lingqu, which is called Xiangjiang River; Second, Nanyuan, Longmen Boundary, Haiyang Town, lingchuan county City, Guangxi Zhuang Autonomous Region; Third, the ocean mountain range in Baishi Township, southern Xing 'an, Guangxi, is near Fengling, where the source is called Shanggui River (Baishi River) and flows eastward to Xibe Estuary as Xiangjiang River; The fourth is Yegouling in Lanshan National Forest Park, Liangziyao Township, Lanshan County, Yongzhou City, Hunan Province. The source of Wild Dog Ridge is Xiaoshui, which meets the water from Guangxi in Pingdao, Yongzhou City, and is called Xiangjiang River.