Licensed items: Power supply business; Installation, maintenance and testing of power transmission, power supply and power reception facilities; Power generation business, power transmission business, power supply (distribution) business (projects that must be approved according to law can only be carried out after approval by relevant departments, and the specific business projects are subject to the approval results) General projects: Plastic products manufacturing; Sales of plastic products; Technical service, technical development, technical consultation, technical exchange, technology transfer and technology popularization; Engineering and technical research and experimental development; Mechanical equipment sales; Sales of mechanical parts and spare parts; Technology import and export; Import and export of goods; Import and export agent (except for projects subject to approval according to law, independently carry out business activities according to law with business license)