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