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Beijing Topsky Century Holding Co., Ltd.
Junhong Electronic & Technology Co., Ltd.
Zhuozhou Tianpeng Imp. & Exp. Trade Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Hongkong Joint Stars Group Limited
Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.