Yancheng, a prefecture-level city under the jurisdiction of Jiangsu Province, is a type II big city and a city in the central area of the Yangtze River Delta. It is located in the east coast of China, the east of Jiangsu Province, the Yellow Sea in the east, Nantong in the south, Yangzhou and Taizhou in the southwest, Huai 'an in the northwest and Lianyungang in the north. Yancheng has a total land area of 1693 1 km2, of which the coastal beach area is 4,553 km2. It has Jiangsu's only world natural heritage-China Yellow Sea (Bohai Sea) migratory bird habitat. By the end of 2022, the permanent population of Yancheng was 6,689,700, and the urbanization rate of the permanent population was 65.43%.

Yancheng has convenient land, sea and air transportation, and basically formed a five-in-one three-dimensional transportation network of expressway, railway, aviation, sea transportation and inland river shipping. Nanyang International Airport, Yancheng Port Dafeng Port Area, Binhai Port Area, Sheyang Port Area and Xiangshui Port Area have become national first-class open ports. Yancheng City has become a prefecture-level city with both airport and seaport, and it is the intersection of national coastal development and Yangtze River Delta integration.