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VY Optoelectronics Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Guangzhou Yihua Electronic Equipment Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Yiwu Wisdom Import & Export Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Henan Forever Medical Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Shanghai Aucy Scientific Instrument Co., Ltd.
GIAI PHOTONICS CO., LTD.
Ningbo Hongbo Optical Instrument Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.