There is more water in the south of the Yangtze River. It seems that every city has a lake as a tourist attraction. The most famous one is of course the West Lake in Hangzhou. As a free and open 5A-level scenic spot, West Lake is widely welcomed by tourists. This is the great wisdom of Hangzhou tourism. But in Nanjing, there is also a beautiful lake. This lake in Nanjing is called Xuanwu Lake. The beauty of Xuanwu Lake is comparable to that of Hangzhou West Lake, and history and culture are even more heavy. The status of Xuanwu Lake is also closely related to the status of Nanjing. In the period of Nanjing as a capital, Xuanwu Lake mostly existed as an imperial garden. Xuanwu Lake has a history of more than 2,000 years. It was called Houhu and Beihu in the ancient times. It was an imperial garden during the Six Dynasties. It was the seat of the Yellow Book Bank during the Ming Dynasty. It was a royal forbidden land. It was not opened until the end of the Qing Dynasty as a park and opened to the public. Xuanwu Lake is nearly five miles away and is divided into Wuzhou (Huanzhou, Yingzhou, Lingzhou, Liangzhou, Cuizhou). The Zhouzhou Dyke Bridge is connected, and there is a mountain and water everywhere. The writer Ouyang Xiu once described Xuanwu Lake: "Jinling Momei is in Houhu; Qiantang Momei is in West Lake." Houhu is now the Xuanwu Lake. When the Three Kingdoms Wu Wang Sunquan diverted water into the palace lake, Xuanwu Lake began to take shape of the lake. After Emperor Wendi destroyed Nanchen, he ordered the Nanjing City to be leveled, and Xuanwu Lake disappeared for the first time in this policy for more than two hundred years.