Introduction to Xuanwu Lake: is located outside the northeast city wall of Nanjing. It was turned into a park in 1909. It was called Yuanwu Lake Park at that time, and was also called Wuzhou Park, Hou Lake, etc. The shores of Xuanwu Lake are diamond-shaped, with a circumference of about 10 kilometers, an area of 437 hectares, and a water surface of about 368 hectares. There are 5 islands in the lake, which divide the lake into four large areas. There are bridges or embankments connecting the islands, making it easy to visit. In summer and autumn, the water surface is green, shaded by pink lotus flowers, the lake is full of fragrance, and the scenery is charming.