General items: technology promotion and application services; manufacturing of seals; manufacturing of rubber products; sale of high-quality special steel materials; manufacturing of communication equipment; manufacturing of electronic components and electromechanical component equipment; manufacturing of automotive parts and accessories; manufacturing of molds; manufacturing of railway locomotive and rolling stock parts; manufacturing of hydraulic power machinery and components; non-ferrous metal casting; non-ferrous metal rolling and processing; manufacturing of metal daily-use products; manufacturing of paper products; goods import and export; manufacturing of hardware products; manufacturing of plastic products; manufacturing of material handling equipment; manufacturing of industrial automatic control system devices; manufacturing of instruments and meters; manufacturing of general equipment (excluding special equipment).