General project: Sales of artificial boards; Wood sales; Furniture sales; Sales of building decoration materials; Retail of hardware products; Sales of doors and windows; Sales of metal products; Sales of building waterproofing membrane products; Import and export of goods; Technology import and export; Sales of chemical products (excluding licensed chemical products); Sales of plastic products; Leasing of construction machinery and equipment; Sales of metal materials; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Information technology consulting services. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law)