Shanghai Siyuan high voltage switch co., ltd
Jiangsu province Rugao high voltage electrics co., ltd
Jiangsu Siyuan Hertz Transformer Co., Ltd.
Shanghai Siyuan Power Capacitor Co., Ltd.
Siyuan qingneng electricity electronics co., ltd
Shanghai sihongrui electric power control technology co., ltd
Shanghai Siyuan photoelectricity co., ltd
Beijing Siyuan Qingneng Electric Electronics Co., Ltd.