Sanlong Town, belonging to Dafeng District of Yancheng City, Jiangsu Province, is located in the northern part of Dafeng District, close to the Yellow Sea in the east, bordering Shanghai Shanghai and Haifeng 2 Farms in the south, neighboring Xinfeng Town in the west, connecting with Provincial Fangqiang Farms in the north, Yancheng National Rare Bird Sanctuary, and Tinghu District of Yancheng City, and is 20 km away from the People's Government in the urban area of Dafeng City, with a total regional area of 153 square kilometers. As of the end of 2019, Sanlong Town has a household population of 52,885. In the Ming and Qing dynasties, it was the land of Wuyouchang Frying Salt Swing, belonging to Yancheng County; in 1990, it was changed from Sanlong Township to Sanlong Town. As of June 2020, Sanlong Town has 3 communities and 19 administrative villages under its jurisdiction, with the town's people's government stationed at No. 1, Longwangmiao Community Zhenlongzhen Road. As of the end of 2019, there are 75 industrial enterprises in Sanlong Town, of which 9 are above scale, and there are 34 comprehensive stores or supermarkets with a business area of more than 50 square meters.