Technology development, technology transfer, technology consulting, technology promotion, technology services; software design; product design; import and export of goods; technology import and export; import and export agency; sales of metal materials, household appliances, daily necessities, Wujinjiaodian, mechanical equipment, motorcycles (excluding three-wheeled motorcycles), clothing, shoes and hats, bags, electronic products, computers, software and auxiliary equipment, sporting goods, rubber products, plastic products, instruments, handicrafts, communication equipment, stationery; leasing of commercial and office buildings. .