General Projects: Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Manufacturing of specialized machinery for water resources; Manufacturing of general equipment (excluding special equipment manufacturing); Repair of general equipment; Research and development of machinery and equipment; Manufacturing of mechanical and electrical equipment; Sales of machinery and equipment; Installation services for general machinery and equipment; Sales of power electronic components; Sales of specialized equipment for environmental protection; Retail of hardware products; Sales of valves and flanges; Sales of hydraulic power machinery and components; Sales of plastic products; Sales of rubber products; Leasing of non-residential real estate (except as otherwise required by law, engage in business operations independently and lawfully in accordance with the business license) Permitted Projects: Import and export of goods (except as otherwise required by law, the operation of specific projects is subject to the approval results, and the operation is permitted in accordance with the provisions of the Company Law)