Use the railway 12306 to buy tickets for others. Do I need to edit the SMS and send it to another number?

No need. According to the query of 12306, the notification information of 12306 will only be sent to the mobile phone number filled in by the ticket purchaser when purchasing tickets. If the other party needs to receive information, you can directly fill in the other party's mobile phone number. 12306 is China Railway Customer Service Center and an important window for railway customer service. It will integrate the passenger and freight transportation information of the whole railway, and provide passenger and freight transportation business and public information inquiry service for social and railway customers.