General project: Manufacturing of specialized equipment for environmental protection; Manufacturing of automotive parts and accessories; Manufacturing of dust removal technology equipment; Paper product manufacturing; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Packaging services; Specialized equipment repair; Installation services for ordinary mechanical equipment; Sales of specialized equipment for environmental protection; Sales of refrigeration and air conditioning equipment; Sales of hydraulic power machinery and components; Sales of seals; Sales of rubber products; Sales of gas compression machinery; Sales of metal products; Sales of metal materials; Retail of hardware products; Sales of paper products; Sales of plastic products; Sales of mechanical and electrical equipment; Sales of ecological environment materials; Mold sales; Sales of chemical products (excluding licensed chemical products); Sales of daily necessities; Needle textile sales; Sales of communication equipment; Electronic product sales; Outdoor product sales; Fishing gear sales; Retail of automotive spare parts; Sales of valves and plugs; Sales of office supplies; Retail of stationery supplies; Sales of building materials; Internet sales (excluding sales of licensed goods). (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)