Eastern Mount Taishan, Western Mount Huashan, Northern Mount Hengshan, Central Mount Songshan, Southern Mount Hengshan, which is the world's five mountains, Raozhou's Panyang, Yuezhou's Qingcao, Runzhou's Danyang, E "Young Learning Qionglin" inside Volume I, the second chapter of the words of "public opinion", the five mountains needless to say, Raozhou, the ancient name, today's Poyang County, Panyang is today's Poyang Lake; Yuezhou, is today's Yueyang City, Qingcao: the name of the lake. Also known as Bachu Lake, it is in the southwest of present-day Yueyang City, Hunan Province, and connected with Dongting Lake. Because of the southern shore of the grass mountain and so named, said that the lake in the grass, winter and spring water dry, grass look, so the name, because now and the Dongting Lake connected to the Dongting Lake, has become part of the Dongting Lake. Runzhou: today's Zhenjiang City, Jiangsu Province, today's Zhenjiang City, Runzhou District, Danyang, that is, Danyang Lake, known as the "giant dip" old name "South Lake", also known as "Xilian Lake". "Taiping Fu Zhi": Danyang old red poplar, a look all Dan, so it is called Danyang, Yang and Yang homophonic, so called Danyang Lake, now Danyang Lake in Anhui Province, Dangtu County in the south and Jiangsu Province, Gaochun County, neighboring, Ezhou, today's Hubei Province, Ezhou City, Dongting, that is, Dongting Lake, Taihu Lake, Taihu Lake, today, is located in the south of Jiangsu Province, Zhejiang Province, connected to the southern part of the Yangtze River delta. It is the largest lake in the offshore region of eastern China.