General items: Internet sales (except for products that require a license); Sales of metal structures; Wholesale of hardware products; Retail of hardware products; Sales of high-performance non-ferrous metals and alloy materials; Sales of metal materials; Sales of slides and projection equipment; Sales of electrical equipment; Culture Rental of supplies and equipment; General machinery and equipment installation services; Sales of electronic products; Sales of machinery and equipment; Sales of semiconductor lighting devices; Sales of lighting appliances; Sales of special equipment for the production of lighting appliances. (Except for projects subject to approval according to law, independently carry out business activities according to law with a business license)