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