Beijing National Railway Research & Design Institute of Siganl & Communication Co.,Ltd.

Beijing Guotie Huachen Communication & Information Technology Co., Ltd.

Beijing Zhongtietong Technology Development Center of Signal & Communication Co., Ltd.

Beijing Railway Signal Co., Ltd.

Shenyang Railway Signal Co., Ltd.

Tianjin Railway Signal Co., Ltd.

Xi'an Railway Signal Co.,Ltd.

Shanghai Railway Commnuication Co.,Ltd.

Chengdu Railway Communication Equipment Co.,Ltd.

Jiazuo Railway Cable Co.,Ltd.

Tianshui Railway Cable Co.,Ltd.

China Railway Signal & Communication Group Ji'nan Engineering Co.,Ltd.  

Beijing Urban Mass Transit Technology Co.,Ltd.

Beijing Xiandai Signal & Communication Engineering Consultant Co., Ltd.

CRSC Shanghai Rail Transportation Technologies Co.,Ltd.

Zhongtong Guohua Dafeng Investment Co.,Ltd.

Tianjin Tongze Railway Signal Equipment Co.,Ltd.

China Railway Signal & Communication Co.,Ltd.Tianjin Engineering Branch

China Railway Signal & Communication Co.,Ltd. Jinan Engineering Branch

China Railway Signal & Communication Co.,Ltd.Beijing Engineering Branch

China Railway Signal & Communication Co.,Ltd.Guangzhou Engineering Branch

China Railway Signal & Communication Co.,Ltd.Beijing Urban Mass Transit Branch

China Railway Signal $ Communication Shanghai Engineering Group Co.,Ltd.

Beijing State Engineering Research Center on Mass Transit Control System Co.,Ltd.