In March 2016, the company won the R&D laboratory order from Hunan Changgao Sirui Automation Co., Ltd., a subsidiary of the professional Hunan large listed company Changgao Group, through bidding.

Hunan Changgao High Voltage Switchgear Group Co., Ltd., abbreviated as "Changgao Group", stock code 002452; We are a private high-tech enterprise specializing in the production of various high-voltage and ultra high voltage switchgear equipment required for large-scale power plants and transmission and transformation construction.