General items: Sales agent; Sales of building materials; Domestic trade agency; Small trade business operation to Taiwan; Trade brokerage; Sales of household appliance parts; Sales of metal tools; Sales of valves and cocks; Sales of metal products; Retail of hardware products; Research and development of hardware products; Sales of mechanical parts and components; Sales of metal parts for construction; Sales of building decoration materials; Wire and cable business; Tool sales; Sales of pumps and vacuum equipment; Wholesale of hardware products; Sales of electrical accessories; Commodity sales; Sales of mechanical equipment; Sales of thermal insulation materials; Sales of arts and crafts and ceremonial articles (except ivory and its products); Fastener sales; Sales of plastic products; Metal structure sales. (In addition to the projects that need to be approved according to law, the business activities shall be carried out independently according to law with the business license)