Research and development of hardware products; Wholesale of hardware products; Retail of hardware products; Manufacturing of hardware products; Sales of metal materials; Sales of doors and windows; Construction of metal doors and windows engineering; Manufacturing and processing of doors and windows; Manufacturing of metal materials; Sales of non-ferrous metal alloys; Sales of metal products; Manufacturing of metal daily necessities; Sales of daily necessities; Furniture sales; Manufacturing of metal tools; Sales of metal tools; Sales of new metal functional materials; Sales of high-performance non-ferrous metals and alloy materials; Manufacturing of metal structures; Sales of metal structures; Manufacturing of plastic products; Sales of plastic products; Import and export of goods; Technology import and export; Domestic trade agency. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license.) Licensed project: construction project construction. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses issued by the relevant departments.)