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OPTECK MANUFACTURING GROUP LTD.
Guangzhou Yihua Electronic Equipment Co., Ltd.
Hangzhou Pnshar Technology Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Wuhan Joho Technology Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Shenzhen Haiwang Sensor Co., Ltd.
Yiwu Wisdom Import & Export Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Foshan Sident Technology Limited