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OPTECK MANUFACTURING GROUP LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Ergas Technology Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Shenzhen Dowdon Tech Co., Ltd.
Shenzhen Ereagle Technology Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Shanghai Aucy Scientific Instrument Co., Ltd.
CPG OPTICS LIMITED
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Qinhuangdao Intrinsic Crystal Technology Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
Nanjing Co-Energy Optical Crystal Co., Ltd.