General Projects: Sales of metal products; manufacturing of non-ferrous metal alloys; manufacturing of metal accessories for construction; manufacturing and processing of doors and windows; rolling processing of non-ferrous metals; metal cutting services; sales of new metal functional materials; sales of high-performance non-ferrous metals and alloys; sales of metal chains and other metal products; sales of metal materials; sales of non-ferrous metal alloys; sales of synthetic materials; sales of metal structures; sales of building materials; sales of lightweight building materials; sales of doors and windows; sales of daily necessities; sales of household appliances; sales of office supplies; sales of labor protection products; sales of electronic products; sales of machinery and equipment; sales of special equipment; online sales (excluding goods requiring a license for sale); retail of hardware products; retail of electronic components; retail of computer hardware, software, and accessories; technical services, technological development, technical consultation, technical exchange, technology transfer, and technology promotion; rental of machinery and equipment; rental of construction machinery and equipment. (Except as otherwise required by law, business operations are independently conducted in accordance with the business license.)