
Pfeifer & Langen Beteiligungsgesellschaft mbH

Sunil Construction Co. Ltd.

DongWoo Optron Co. Ltd.

Songpu Technology Dongguan Co. Ltd.

Solder Coat Co. Ltd.Aichi-ken, Japan

Datang Gaohong Zhilian Technology (Chongqing) Co. Ltd.

Shanghai Creatoo Network Technology Co.,Ltd.

Xiamen Um Opto Technology Co. Ltd.

Luoyang Zhida Petrochemical Engineering Co., Ltd.

Net Plastic Co. Ltd.

Hunan Zhengming Environmental Protection Co., Ltd.

Wuhan Gee Network Technology Co., Ltd.