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