Sales of electronic products; Sales of rubber products; Sales of plastic products; Sales of building materials; Sales of machinery and equipment; Sales of office supplies; Sales of lighting appliances; Sales of wires and cables; Wholesale of hardware products; Retail of hardware products; Research and development of hardware products; Technical services, technology development, technical consultation, technical exchanges, technology transfer, technology promotion. (Except for projects that must be approved according to law, business activities can be independently carried out in accordance with the law with the business license) Rubber product manufacturing; Plastic product manufacturing.