Shenzhen Test Technology Co., Ltd. was established in 2003 and is located in Shenzhen High-tech Industrial Park. Shenzhen Test Technology provides customers with integrated solutions and products for sensing, transmission and electromagnetic compatibility. Successfully realized the construction cooperation and perfect implementation of the power system scheme for the Italian metro locomotive system manufacturer; provided a mature solution for the interior lighting system and passenger communication system of the Italian metro car manufacturer. The company's top ten customers include CRRC, State Grid, Southern Power Grid, GE, Siemens, and Tyco. It is expected that the next few years will maintain a relatively rapid growth momentum.