Design, manufacturing, processing and sales of automobile parts, motorcycle parts, automobile fixtures, fine blanking dies, precision cavity molds, mold standard parts, and rubber products; testing and consulting services for automobiles and their parts, motorcycles and their parts, electromechanical equipment, and electronic products; calibration services for instruments; engaged in technology development, technical services, technical consultation, technology transfer in the field of network technology and testing and measurement systems, network engineering, rubber and plastic products, metal materials, chemical products (except hazardous chemicals, Monitor the sales of chemicals, precursor chemicals), metal products, wires and cables, mechanical equipment, electromechanical equipment, environmental protection equipment, electronic products, auto parts, packaging materials, labor protection supplies, and steel products (including online sales); design, development, production, assembly, repair, maintenance: testing equipment and parts, instruments and sensors, control systems and their software and hardware; testing and measurement technology training; conference services; engaged in import and export business and commission agency for various commodities and technologies (except auctions).