General projects: technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Sales of optical instruments; Sales of instruments and meters; Optical glass sales; Glasses sales (excluding contact lenses); Sales of mechanical and electrical equipment; Sales of semiconductor device specific equipment; Sales of mechanical parts and components; Sales of Class I medical devices; Sales of Class II medical devices; Sales of cameras and equipment; Sales of household appliances; Sales of electronic products; Sales of plastic products; Sales of daily necessities; Retail of hardware products; Sales of metal products; Sales of non-ferrous metal alloys; Sales of daily masks (non medical); Retail of automotive spare parts; Sales of needle textiles and raw materials; Sales of synthetic materials; Sales of labor protection equipment; Sales of office supplies; Sales of packaging materials and products; Import and export of goods; Technology import and export; Information consulting services (excluding licensed information consulting services); Domestic trade agency; Conference and exhibition services. (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)