Yangcheng Lake belongs to Suzhou. Yangcheng Lake is five kilometers northeast of Suzhou City, spanning Wuxian County and Kunshan County. Although geographically across Kunshan, administrative jurisdiction still belongs to Suzhou. On the bank of Yangcheng Lake, it is adjacent to Shanghai in the east and Suzhou in the west. Beijing-shanghai railway and Shanghai-Nanjing Expressway, National Highway 3 12, all pass by, only half an hour's drive from Shanghai Hongqiao Airport.

Yangcheng Lake, also known as Yangcheng Lake, is located in the northeast of Suzhou City and is one of the important freshwater lakes in Jiangsu Province. It has a unique water environment, geographical location and aquatic environment, and is rich in aquatic resources. It is rich in dozens of fresh water products. Siniperca chuatsi, soft-shelled turtle, white fish, eel, prawn and hairy crab are the "six treasures in the lake", among which Yangcheng Lake Qingshui hairy crab, known as the "king of crabs", is well-known at home and abroad.

Yangcheng Lake is the third largest freshwater lake in Taihu Plain, with two natural ridges running through the north and south. It is divided into three lakes: East Lake, Middle Lake and West Lake, of which East Lake is the largest. There are many branches connecting the three lakes. It is a storage lake for flood control, drainage, water diversion and irrigation in Yangcheng area. It is also the main drinking water source in Suzhou and Kunshan. Yangcheng Lake is a huff and puff lake, which receives water from Wang Yu and Changshu from the west and northwest. It flows eastward through Qiputang, Yanglintang and Loujiang (Liuhe) and enters the Yangtze River respectively. It is the regulating center of the tributary river network of Yangcheng Lake.