Business scope: Design, manufacture and sales of marine and land-use environmental protection equipment; Environmental protection engineering, housing construction engineering, municipal engineering, mechanical and electrical engineering design, consultation and construction; Research and development of new environmental protection products and technologies; Steel, non-ferrous metals, pressure Container equipment sales; Self-operated and agency import and export business of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited from import and export). (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments)

General items: Leasing services (excluding publications leasing) (except for items subject to approval according to law, business activities are carried out independently according to law with business licenses)