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Foshan Sident Technology Limited
Shijiazhuang Zeyuan Optics Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Shenzhen Newerton Technology Co., Ltd.
GIAI PHOTONICS CO., LTD.