Manufacture of hardware products; Wholesale of hardware products; Manufacture of bearings, gears, and transmission components; Sales of bearings, gears, and transmission components; Sales of high-speed precision gear transmission devices; Research and development of hardware products; Research and development of metal products; Manufacture of daily-use metal products; Sales of metal products; Manufacture of metal tools; Retail of hardware products; Manufacture of plastic products; Sales of plastic products; Manufacture of rubber products; Sales of rubber products; Manufacture of hand carts and animal-drawn vehicles; Sales of hand carts and animal-drawn vehicles; Manufacture of molds; Sales of molds; Manufacture of household appliances; Sales of household appliances; Sales of household appliance parts; Sales of electronic products; Research and development of mechanical equipment; Manufacture of lighting fixtures; Sales of lighting fixtures; Import and export of goods; Import and export of technology. (The above business scope includes: import and export of goods or technology, except for those prohibited or subject to administrative approval by the state.)