technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; Class I medical device sales; Class II medical device sales; sales of veterinary special equipment; Internet sales; import and export of goods; technology import and export; sales of metal products; consulting and planning services; sales of electronic products; retail of electronic components; retail of household appliances; retail of computer hardware and software and auxiliary equipment; sales of machinery and equipment; instrumentation sales; Office supplies sales. Licensed items: sales of disinfection equipment.