Manufacturing of rubber products; sales of rubber products; manufacturing of seals; sales of seals; manufacturing of plastic products; sales of plastic products; research and development of metal products; manufacturing of metal chains and other metal products; sales of metal products; mold manufacturing; mold sales; hardware product research and development; hardware product manufacturing; hardware product retail; building decoration, plumbing pipe parts and other construction metal products manufacturing; Manufacturing of automobile parts and accessories; manufacturing of agricultural, forestry, animal husbandry and fishery machinery parts; sales of machinery and equipment; manufacturing of lightweight building materials; sales of building materials; research and development of machinery and equipment; research and development of motorcycles and parts; sales of daily ceramic products; manufacturing of household appliances; sales of household appliances; sales of communication equipment; import and export of goods; import and export of technology; manufacturing of photovoltaic equipment and components; sales of photovoltaic equipment and components Sales; mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; electrical equipment manufacturing; electrical equipment sales; industrial automatic control system device manufacturing; industrial automatic control system device sales; distribution switch control equipment manufacturing; distribution switch control equipment sales; distribution switch control equipment research and development; power facility equipment manufacturing; power facility equipment sales; power electronic component manufacturing; power electronics Sales of sub-components; R&D of smart robots; Manufacturing of industrial robots; Sales of smart robots; Manufacturing of smart instruments; Sales of smart instruments; Business of wires and cables; Research and development of efficient and energy-saving technologies in the power industry; Internet of Things technical services; Manufacturing of Internet of Things equipment; Sales of Internet of Things equipment; Manufacturing of electronic components and electromechanical components and equipment; Sales of electronic components and electromechanical components and equipment