The following are the stock code information of some major railway companies listed in Chinese mainland (for reference only, the actual information is subject to the Stock Exchange):
1. China Railway Engineering Group Co., Ltd., stock code: 60 1 186, listed on the Shanghai Stock Exchange.
2. China Railway Transportation Group Co., Ltd. (stock code: 60 1390) is listed on the Shanghai Stock Exchange.
3. China Railway Construction Co., Ltd., stock code: 60 1 186, listed on the Shanghai Stock Exchange.
Please note that the stock code may change, so you must check the latest information when inquiring. In addition, if you need to query the stock codes of other railway companies, I suggest you provide the specific company name to provide you with more accurate information.