Research, Development, Production, and Sales: High and low voltage electrical equipment, high and low voltage electrical components series products, power transformers, distribution transformers, box-type distribution transformers, special-purpose transformers, composite transformers, box-type substations, cable branch boxes, outdoor switchgear, bus ducts, cable trays, wires and cables, instruments and meters, hardware equipment, general machinery, firefighting equipment, combiner boxes, grid-tie boxes, photovoltaic inverters, smart IoT devices; R&D, design, production, sales, and maintenance of charging piles (stations) and energy-saving emission reduction facilities; R&D, design, manufacturing, and sales of automated power energy efficiency management and automation control equipment; Power energy efficiency management, energy performance contracting, energy-saving technical consulting; Import and export of goods or technologies (excluding those prohibited by the state or requiring administrative approval); Installation, maintenance, and testing of power supply facilities and power receiving facilities; Construction engineering; Electromechanical equipment installation engineering; Fire protection engineering; Architectural decoration design and construction; Engineering technical consulting services; Construction labor subcontracting. (Projects subject to approval by relevant authorities must obtain such approval before commencing operations. )