General Projects: Manufacturing of glass fiber reinforced plastic products; Sales of glass fiber reinforced plastic products; Manufacturing of specialized environmental protection equipment; Sales of non-metallic minerals and products; Water pollution treatment; Sales of specialized environmental protection equipment; Water environment pollution prevention and control services; Sewage treatment and regeneration; Environmental protection monitoring; Municipal facility management; Sales of gas and liquid separation and purification equipment; Sales of pumps and vacuum equipment; Manufacturing of ecological environment materials; Engineering and technical research and development; Installation services for public facilities of environmental health; Manufacturing of general equipment (excluding special equipment manufacturing); Manufacturing of metal structures; Manufacturing of metal materials; Manufacturing of general parts and components; Sales of metal materials; Sales of high-quality special steel materials; Sales of metal structures; Research and development of new materials; Steel rolling; Manufacturing of asbestos cement products; Manufacturing of power electronic components; Manufacturing of power facility equipment; Sales of optical fibers; Operation of wires and cables; Manufacturing of mechanical and electrical equipment; Manufacturing of building decoration, water and heating pipe fittings, and other building metal products; Sales of pipeline transportation equipment; Sales of valves and flanges; Sales of special equipment; Manufacturing of specialized machinery and equipment for water resources; Manufacturing of pumps and vacuum equipment; Research and development of valves and flanges; Manufacturing of general valves and flanges (excluding special equipment manufacturing); Engineering management services. (Except for the business operations that are required to be regularly performed, the company operates independently and lawfully based on its business license.)