Scope of business includes: General items: Manufacturing of power distribution switch control equipment; Sales of power distribution switch control equipment; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Manufacturing of power facility equipment; Sales of electrical accessories; Sales of electrical equipment; Sales of lighting fixtures; Sales of electrical signal equipment devices; Manufacturing of electrical accessories; Sales of metal chains and other metal products; Sales of power electronic components; Manufacturing of electronic components; Manufacturing of electronic components and electromechanical component equipment; Sales of electronic components and electromechanical component equipment; Manufacturing of power electronic components; Sales of electronic measuring instruments; Manufacturing of electronic measuring instruments; Manufacturing of metal chains and other metal products; Retail of electronic components; Manufacturing of instruments and meters; Sales of synthetic materials; Sales of instruments and meters; Retail of hardware products; Manufacturing of hardware products; Sales of metal tools; Sales of mechanical parts and components; Sales of optical cables; Operation of wires and cables; Sales of power facility equipment; Sales of office equipment; Sales of photovoltaic equipment and components; Sales of intelligent power transmission and distribution and control equipment; Manufacturing of power transmission and distribution and control equipment; Sales of rubber products; Manufacturing of transformers, rectifiers, and inductors; Sales of mining machinery; Sales of pneumatic power machinery and components; Manufacturing of pneumatic power machinery and components; Sales of industrial automatic control system devices; Manufacturing of industrial automatic control system devices; Manufacturing of high-speed rail equipment and accessories; Sales of high-performance sealing materials; Manufacturing of mining machinery; Sales of metal materials; Sales of metal products; Manufacturing of metal materials (except for projects that require approval according to law, business activities are carried out independently with a business license in accordance with the law)