Power quality testing (relevant administrative licenses or approvals must be obtained before engaging in business); research and development, design, production, sales, technical services, technology transfer, maintenance: high and low voltage distribution equipment components and complete sets of equipment, control equipment, bus ducts, distribution boxes, distribution cabinets, bridges and accessories, automobiles Accessories, motorcycle accessories (the above involving the construction and maintenance of power facilities and equipment must obtain relevant qualifications or approval before engaging in business); engaged in the import and export of goods and technology; sales: computer software, electronic products (excluding electronic publications), communication equipment (excluding radio transmission) and ground receiving equipment), fire protection equipment, protection devices and control devices for power distribution equipment, automation equipment; R&D, design, production, sales, technical services, technology transfer: mechanical equipment, general equipment, compressor system equipment and accessories, expanders and accessories, steam turbines and accessories, industrial Engineering machinery and coal mining equipment; R&D, production and sales: chemical raw materials (excluding hazardous chemicals and precursor drugs); technology development, technical services, technology transfer, and technical consulting in the professional field of energy-saving equipment technology; sales: mechanical and electrical equipment, Wujiaodian, wires and cables; contract energy management. (The above scope shall not be operated if it is prohibited by national laws and regulations; it shall be subject to examination and approval according to national laws and regulations, but shall not be operated before approval is obtained)*