Manufacturing and sales of marine engine injection systems and governor parts and accessories, special equipment for oil drilling, high-strength bolts, nuts and standard fasteners, auto parts, motorcycle parts, electromechanical equipment, construction engineering machinery, and steel structures; Wujinjiaodian, distribution transformers Sales and after-sales service of voltage regulators, wires and cables, complete sets of power equipment, circuit breakers, insulation products, distribution boxes, bus ducts, hardware, iron accessories, cable trays; sales of plastic products, steel, wire rods, rebar, coils, galvanized sheets, color-coated sheets, and electromechanical products