Import and export of goods or technology (excluding goods and technology prohibited by the state or involving administrative approval); Sales: Refractory materials, packaging materials, mechanical equipment, electronic products, wires and cables, electric tools, household appliances, communication equipment, photography equipment, environmental protection equipment, automotive accessories, instruments and meters, first-class medical devices, building materials, ceramic products, toys, refrigeration equipment, valves, pipeline accessories. (For licensed business projects, they must obtain permission from relevant departments before operating)