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Shenzhen Dowdon Tech Co., Ltd.
Shenzhen Pontron Group Ltd.
Beijing Tengcontrol Technology Co., Ltd.
TIANYIDA TECHNOLOGIES LIMITED
Shenzhen Yuanchen Technology Co., Ltd.
Shenzhen Zhuyifang Technology Co., Ltd.
HSDA Technology Co., Limited
Shenzhen Taiyue Communication Cable Co., Ltd.
Nie-Tech Co., Ltd.
Shenzhen One Audio Electronics Manufacture Limited
Tyshen Technology Co., Limited