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