 The largest of these lakes is Dongting Lake, which is located on the border of Hunan and Hubei provinces, and is the outlet for most of the rivers in Hunan.At Wuhan, it receives its biggest tributary, the Han River, bringing water from its northern basin as far as Shaanxi.At the northern tip of Jiangxi, Lake Poyang, the biggest freshwater lake in China, merges into the river.