Star Mechanical & Electrical Engineering Co., Ltd. Zhuhai Zhi main business: 
 Engineering: Water Supply Project, various frequency energy projects, industrial self-supporting wheel equipment modification, non-standard automation equipment design and manufacturing; PLC and microcontroller programming, circuit board development. 
 Maintenance: Professional maintenance of industrial circuit boards, inverter, servers, servo motors, instrumentation, PLC, touch screen, industrial automation equipment, medical equipment. 
 Sales: drive, PLC, server, SANWO (c and), AIRTAC (AirTAC), SMC pneumatic components, temperature control, ENIDINE (security force be) buffer, low-voltage power distribution and other industrial equipment, the United States BIMBA Bin Pa cylinder, Sweden, PIAB vacuum, South Korea JPI shock absorber, PIG cleaning products, 
 British alcon solenoid valve, New Zealand CLIPPER joints, the United States COMPACT, TRD cylinder, Germany RECTUS joints, such as the United States TURN-ACT cylinder.