Power facility equipment manufacturing; Electronic components and electromechanical component equipment manufacturing; Power electronic components manufacturing; Power distribution switchgear equipment manufacturing; Transformer, rectifier and inductor manufacturing; Photovoltaic equipment and components manufacturing; Power transmission, transformation and distribution monitoring and control equipment manufacturing; Capacitor and its supporting equipment manufacturing; Mechanical and electrical equipment manufacturing; Mechanical parts and components processing; Metal processing machinery manufacturing; Electrical equipment repair; Power distribution switchgear equipment research and development; Electronic and mechanical equipment maintenance (excluding special equipment); General mechanical equipment installation services; Road freight transport for vehicles with a total mass of 4.5 tons or less (excluding online freight and dangerous goods); Loading and unloading; Leasing services (excluding licensed leasing services); Foreign contracted projects; Earthwork and stonework construction; Labor services (excluding labor dispatch); Power electronic components sales; Power facility equipment sales; Mechanical and electrical equipment sales; Electronic components and electromechanical component equipment sales; Surface functional material sales; Chemical product sales (excluding licensed chemical products) Licensed items: Electrical installation services; Installation, repair and testing of power transmission, supply and reception facilities; Construction engineering construction; Professional construction operations; Construction labor subcontracting; Construction engineering design; Road freight transport (excluding dangerous goods).