Engaged in technical development, technical consulting, and technical services in the field of instruments and meters; Sales of instruments and meters, electrical equipment, electronic products, communication equipment (excluding satellite radio and television ground receiving facilities), refrigeration equipment, environmental protection equipment, household goods, water pipe valves, hardware and electrical appliances, sports and cultural goods, computers, software, and auxiliary equipment (excluding computer information system security-specific products), fitness equipment, mechanical and electrical equipment and accessories, wood and wood products, building materials, daily necessities, furniture, clothing and accessories, arts and crafts; On-site installation and maintenance of mechanical and electrical equipment (excluding special equipment); Business consulting (excluding brokerage), computer system integration. (Projects subject to approval according to law can only be carried out after approval by relevant departments. )