Transformers, rectifiers and inductors manufacturing; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Power distribution switchgear equipment research and development; Power distribution switchgear equipment manufacturing; Power distribution switchgear equipment sales; Power facility equipment manufacturing; Power facility equipment sales; Power transmission and distribution and control equipment manufacturing; Intelligent power transmission and distribution and control equipment sales; Electrical equipment sales; Electrical equipment repair; Intelligent basic manufacturing equipment manufacturing; Intelligent basic manufacturing equipment sales; Solar thermal power generation equipment sales; Wind farm related equipment sales; Power industry high-efficiency energy-saving technology research and development; Wire and cable operation; Hardware products wholesale; Road freight transport of general cargo vehicles with a total mass of 4.5 tons and below (excluding online freight and dangerous goods); Technical services, technology development, technology consulting, technology exchange, technology transfer, technology promotion; Import and export of goods; Import and export of technology.