General project: operation of wires and cables; Fiber optic sales; Fiber optic cable sales; Sales of instruments and meters; Sales of electrical instruments and meters; Sales of intelligent instruments and meters; Sales of supply instruments and meters; Sales of mechanical and electrical equipment; Sales of power electronic components; Sales of valves and plugs; Sales of pumps and vacuum equipment; Sales of photovoltaic equipment and components; Sales of electrical accessories; Sales of distribution switch control equipment; Sales of lighting fixtures; Sales of metal materials; Sales of metal structures; Sales of fasteners; Wholesale of hardware products (except for licensed businesses, can independently operate projects that are not prohibited or restricted by laws and regulations)