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OPTECK MANUFACTURING GROUP LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Aucy Scientific Instrument Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
VY Optoelectronics Co., Ltd.
Canfort Laboratory and Education Supplies Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
CPG OPTICS LIMITED
Nanjing Co-Energy Optical Crystal Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Henan Forever Medical Co., Ltd.
Shenzhen Siyuan Digital Technology Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.