General project: Sales of power facilities and equipment; Sales of power electronic components; Sales of mechanical and electrical equipment; Sales of electrical equipment; Sales of electrical equipment; Electrical equipment repair; Operation of wires and cables; Installation services for ordinary mechanical equipment; Sales of mechanical equipment; Sales of chemical products (excluding licensed chemical products); Sales of metal materials; Wholesale of hardware products; Retail of hardware products; Sales of metal products; Sales of rubber products; Sales of plastic products; Sales of metal structures; Sales of doors and windows; Sales of mechanical parts and components; Sales of distribution switch control equipment; Sales of electrical signal equipment devices; Sales of battery spare parts; Sales of charging stations; Sales of intelligent power transmission and distribution and control equipment; Battery sales; Sales of metal wire ropes and their products; Sales of high-quality special steel materials; Sales of electrical accessories; Retail of electronic components; Sales of optical communication equipment; Sales of electrical instruments and meters; Fiber optic cable sales; Sales of metal tools; Sales agent; Project planning and public relations services; Engineering management services; Import and export of goods; Technology import and export; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Professional design services; In