Manufacturing, processing, and sales of distribution switch control equipment, instruments (excluding measuring instruments), auto parts, motorcycle accessories, electronic components, electrical components, mechanical equipment, and hardware; mechanical processing and sales of stainless steel products, copper tubes, and aluminum tubes; high and low voltage electrical and complete sets of equipment, power transmission and distribution equipment, power equipment, automation control equipment, electronic products, electromechanical equipment, switch manufacturing and processing (operated by branches above the upper limit); auto parts, electrical equipment, wires and cables, metal products, electrical accessories, Wujinjiaodian, and handicraft sales.