Electric motor manufacturing; micro and special motors and components manufacturing; gears, gear reducers, and gearboxes manufacturing; bearings, gears, and transmission components manufacturing; railway rolling stock parts manufacturing; mechanical and electrical equipment manufacturing; industrial automatic control system device manufacturing; transformers, rectifiers, and inductors manufacturing; mechanical parts and components processing; micro and special motors and components sales; gears, gear reducers, and gearboxes sales; bearings, gears, and transmission components sales; railway rolling stock parts sales; mechanical and electrical equipment sales; industrial automatic control system device sales; electronic components wholesale; electronic components and electromechanical components equipment sales; motor and its control system R&D; technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; software development; software sales; procurement agency services; leasing services (excluding licensed leasing services); import and export of goods; import and export of technology; import and export agency.