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Shenzhen Sumring Technology Co., Limited
Shenzhen Professional Security Technology Co., Limited
Nie-Tech Co., Ltd.
Shanghai Kingtech Industrial Co., Ltd.
Shenzhen Safety Electronic Technology Co., Ltd.
Shenzhen Chitongda Electronic Co., Ltd.
Ningbo Ambest Electronics Co., Ltd.
Hao Nai Industrial Co., Ltd.
Ease Security Co., Ltd.