Hardware product manufacturing; Research and development of hardware products; Wholesale of hardware products; Retail of hardware products; Research and development of distribution switch control equipment; Manufacturing of distribution switch control equipment; Sales of distribution switch control equipment; Manufacturing of electronic components; Sales of power electronic components; Electrical equipment manufacturing; Sales of electrical equipment; Sales of building decoration materials; Research and development of household appliances; Manufacturing of household appliances; Sales of household appliances; Manufacturing of lighting fixtures; Sales of lighting fixtures; Manufacturing of mechanical and electrical equipment; Sales of electrical equipment; Manufacturing of power electronic components;