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