China Railway Shanhaiguan Bridge Group Co.,Ltd
China Railway Baoji Bridge Group Co.,Ltd
China Railway Science and Industry Group Co.,Ltd
China Railway Engineering Equipment Group Co.,Ltd
China Railway Jiujiang Bridge Engineering Co.,Ltd
China Railway Engineering Services Co.,Ltd
China Railway Maglev Science & Technology（chengdu） Co.,Ltd
China Railway Communications Investment Group Co.,Ltd
China Railway Environmental Science & Technology Engineering Co.,Ltd