Mold manufacturing; mold sales; retail of hardware products; wholesale of hardware products; sales of metal products; wholesale of electronic components; retail of auto parts; retail of computer software, hardware and auxiliary equipment; sales of advanced power electronic devices; hardware product manufacturing; non-ferrous metal casting; sales of forgings and powder metallurgy products; manufacturing of forgings and powder metallurgy products; sales of metal cutting and welding equipment; manufacturing of metal cutting and welding equipment; metal surface treatment and heat treatment processing; manufacturing of special equipment for electrical machinery; manufacturing of plastic products; sales of plastic products; Manufacturing of general parts; manufacturing of fasteners; sales of fasteners; sales of lubricants; retail of daily household appliances; manufacturing of power electronic components; manufacturing of non-ferrous metal alloys; manufacturing of rubber products; manufacturing of metal materials; plastic surface treatment; manufacturing of capacitors and supporting equipment; sales of mechanical and electrical equipment; sales of electrical equipment; retail of electronic components; manufacturing of supply instruments and meters; manufacturing of electronic components; manufacturing of special machinery for the production of building materials; sales of building materials; retail of cosmetics; wholesale of cosmetics; wholesale of kitchenware, sanitary ware and daily miscellaneous goods; casting Sales of molding materials; sales of daily necessities; sales of gas, liquid separation and purification equipment; manufacturing of gas, liquid separation and purification equipment; manufacturing of special equipment for environmental protection; sales of special equipment for environmental protection; sales of rubber products; sales of packaging materials and products; manufacturing of automotive decorative products; repair of daily appliances; sales of electrical equipment; processing and manufacturing of lubricants (excluding hazardous chemicals); sales of smart vehicle equipment; manufacturing of smart vehicle equipment; manufacturing of metal tools; sales of lighting equipment; sales of special equipment for semiconductor devices; lighting Manufacturing of appliances; manufacturing of special equipment for semiconductor devices; manufacturing of daily groceries; sales of daily groceries; sales of special labor protection products; sales of electronic components and electromechanical components and equipment; manufacturing of instruments and meters; sales of office supplies; sales of refrigeration and air-conditioning equipment; manufacturing of refrigeration and air-conditioning equipment; manufacturing of machinery for construction projects; repair of electrical equipment; sales of pneumatic and electric tools; manufacturing of general equipment (excluding manufacturing of special equipment); maintenance of electronic and mechanical equipment (excluding special equipment); import and export of goods; import and export of technology; manufacturing of experimental analysis instruments