Research and development, production, sales and exhibition of communications, navigation, radio and television electronic products, electronic computers and accessories, office automation equipment, electronic instrumentation, household appliances, electrical equipment, electronic components, electronic special equipment (including supporting general equipment); sales of electromechanical equipment and spare parts; contracting of electronic system engineering and information network engineering; engineering design; electronic product supervision and testing; import and export business; tapes, motorcycles Sales of cars, automobiles, and auto parts; technical consultation, technical services, information services, and after-sales services related to the above-mentioned projects; warehousing and equipment leasing business related to the above-mentioned businesses; using self-owned windows and billboards to undertake mechanical and electrical product advertising business; house decoration and renovation; property management; leasing of self-owned houses; computer information system integration, software development; wholesale of pre-packaged food; sales of food; and operating telecommunications business.