General items: Rolling processing of non-ferrous metals, processing of mechanical parts and spare parts, smelting of commonly used non-ferrous metals: Metal processing machinery manufacturing: Non-ferrous metal alloy manufacturing: Special machinery manufacturing for building materials production: Foundry machinery manufacturing: Machinery manufacturing for construction engineering; Mechanical and electrical equipment manufacturing: Sales of non-ferrous metal alloys: Sales of commercial non-ferrous metals and alloy materials: Sales of special equipment for oil refining and chemical production: Production of chemical products (excluding licensed chemical products): General mechanical equipment installation service 1 petroleum products manufacturing (excluding dangerous chemicals): Landscaping engineering construction machinery and equipment leasing: Research and development of mechanical equipment (except for projects that must be approved according to law, business activities can be independently carried out according to law with business license).