Operations prohibited by laws, regulations, and State Council decisions shall not be conducted; operations requiring permits (approvals) as stipulated by laws, regulations, and State Council decisions shall be conducted only after obtaining permit (approval) documents from the approving authority; operations not requiring permits (approvals) as stipulated by laws, regulations, and State Council decisions shall be independently selected by market entities. (Aluminum, steel, and non-ferrous metal rolling processing; common non-ferrous metal smelting; non-ferrous metal casting; metal wire rope and its product production and sales; building materials wholesale; metal materials, high-performance non-ferrous metals and alloy materials, forgings and powder metallurgy products, non-ferrous metal alloys, metal structures, wires, cables, awnings, doors and windows, daily-use products, plastic products, sealing fillers, cork products, hardware products, optical glass, glass fiber reinforced plastic products, glass fiber and products, glass instruments, coatings (excluding hazardous chemicals), fans, blowers, refrigeration and air conditioning equipment, fire-fighting equipment, security equipment, building metal accessories, railway locomotive and rolling stock parts, waste carbon fiber composite material treatment equipment sales; aluminum alloy doors and windows, zinc steel guardrail production and installation; metal waste and scrap processing; construction waste recycling technology research and development; renewable resource processing and recycling (excluding production scrap metal); mechanical equipment leasing.)