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China Railway 18th Bureau Group Co., Ltd.China State Construction Engineering Corp. Ltd.Chengdu Xinzhu Road & Bridge Machinery Co., Ltd.TianJin 712 Communication & Broadcasting Co., Ltd.Beijing Urban Construction Design & Development Grp Co., LtdChina Railway Hi-tech Industry Corp. Ltd.UniTTEC Co., Ltd.Hongrun Construction Group Co., Ltd.Hongrun Construction Group Co., Ltd.Beijing Tieke Shougang Railway-Tech Co. Ltd.Nanjing TYCHO Information Technology Co., Ltd.Nanjing TYCHO Information Technology Co., Ltd.Beijing Togest Automation System Equipment Co., Ltd.Tianjin Metro Group Co., Ltd.China High-Speed Railway Technology Co., Ltd.CRRC Corp. Ltd.Ningbo Construction Co., Ltd.Guiyang Urban Rail Transit Co., Ltd.Hefei Urban Rail Transit Co. Ltd.