Business scope includes licensed items: Ship inspection services; Hydraulic engineering quality inspection; Port operation; High risk sports (diving); Surveying and mapping services (for projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, the specific business projects shall be subject to the approval results) General projects: Offshore engineering platform equipment manufacturing; Marine services; Marine engineering key supporting system development; Marine engineering equipment manufacturing; Offshore wind power related equipment sales; Manufacture of equipment for mariculture and utilization of Marine living resources; Water pollution prevention and control services; Diving and salvage equipment manufacturing; Sales of diving rescue equipment; Subsea systems and equipment manufacturing; Wholesale of aquatic products; Water transport equipment spare parts sales; Water resources management; Water pollution control; Ship port services; Ship leasing; Ship towing service; Highway and water transport engineering test and inspection services; Salvage services; Emergency rescue services; Special equipment repair; Professional cleaning, cleaning, disinfection services; Municipal facilities management; Research and development of emerging energy technologies; Import and export of goods; Technology import and export; Import and export agent (except for items subject to approval according to law, independently carry out business activities according to law with business license)