Licensed project: Import and export of goods; Technology import and export. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments. Specific business projects shall be subject to approval documents or licenses issued by relevant departments. ) General projects: Sales of metal materials; Sales of non-ferrous metal alloys; Sales of high-quality special steel materials; Research and development of biochemical product technology; Sales of metal based composite materials and ceramic based composite materials; Sales of building metal accessories; Sales of new metal functional materials; Sales of high-performance non-ferrous metals and alloy materials; Sales of building materials; Sales of lightweight building materials; Sales of building waterproofing membrane products; Sales of building steel reinforcement products; Wholesale of hardware products; Retail of hardware products; Sales of daily necessities; Sales of anti-corrosion materials; Sales of insulation and sound insulation materials; Wholesale of kitchenware, sanitary ware, and daily necessities; Retail of kitchenware, sanitary ware, and daily necessities; Sales of office supplies; Sales of chemical products (excluding licensed chemical products); Steel rolling processing [branch operation]; Manufacturing of metal daily necessities [branch operation]; Manufacturing of building decoration, plumbing pipe parts, and other building metal products [branch operation]; Metal structure manufacturing [branch operation]; Sales of coatings (excluding hazardous chemicals); Sales of plastic products; Non ferrous metal rolling processing [branch operation]; Spray coating processing [branch operation]; Daily miscellaneous goods manufacturing [branch operation]; Sales of daily necessities. (Except for projects that require approval according to law, business activities shall be conducted independently based on the business license in accordance with the law)