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Hongkong Joint Stars Group Limited
Dongguan V Finder Electronic Technology Co., Ltd.
Junhong Electronic & Technology Co., Ltd.
Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Zhengzhou Nanbei Instrument Equipment Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)