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