Jiangsu Hailong Subsea Engineering Co., Ltd. was established in 2009 and specializes in harbor and channel dredging projects, hydraulic engineering, underwater sediment removal for rivers, lakes, reservoirs, sludge dewatering and drying, chemical sludge drying, tube bag dewatering construction, underwater pipeline construction, underwater engineering, caisson manufacturing and sinking, and wholesale construction of bagging materials for construction projects.

The company is a legally independent entity, with 10 construction teams, over 200 employees, more than 40 specialized workers, and 23 technical personnel. It boasts a team of highly skilled, dedicated, inquisitive, and experienced engineers and construction workers. The company has successfully completed a series of large-scale waterway and environmental projects, including riverbed dredging, sludge dewatering and drying, and underwater pipeline engineering. Notable projects include the reclamation and leveling of the wharf foundation at the coastal port coal terminal, the underwater dredging and cleaning video project at the Datang International Lüshu Port intake, the Qinghe River dredging and dewatering project in Handan, the Louli River riverbed dredging and dewatering project in Suzhou, the Taohua River riverbed dredging and dewatering project in Nanchang, the riverbed dredging and drying project in Hubei Province's Qichun County, the sludge drying project at the Lingshan Wastewater Treatment Plant, the underwater pipeline installation at the Hengda Haohua Island, the submerged pipeline construction in Zhanjiang, the submerged pipeline construction at the Xibei Waterworks in Guangxi, and the water intake head submerged pipeline construction project at the Hadu Reservoir. The company has procured a large number of large equipment, including diaphragm presses, plate and frame presses, belt presses, assembled dredging vessels, assembled cutter suction dredgers, amphibious excavators, long-reach excavators, and others, which meet the equipment requirements for most projects.