Does Gucheng Lake have anything to do with retreating from polder to camel head?

Have an impact. The retreat of Gucheng Lake to Camel Head has an impact on the water system of Gucheng Lake and Shuiyangjiang River, a tributary of the Yangtze River. Located in the south-central part of Gaochun District, Nanjing, it is named after the ancient "ancient city" by the lake, commonly known as Hu Xiaonan. It is a natural regulating lake in the lower reaches of Shuiyangjiang River and the natural lake with the best drinking water quality in Jiangsu Province. The main inflow river is Sugagawa, which is rich in natural bait and suitable for crab culture, and has become a pillar industry of Gaochun agriculture.