12306 or real-name authentication. Those who fail to pass the information authentication in real-name registration system need to bring their valid identity certificate to the railway station for identity authentication, and only after passing the authentication can they purchase tickets.

The relevant provisions are as follows:

"To be verified" refers to registered users and common contacts (passengers) who hold resident identity cards and whose identity information has not been verified by the national identity certification authority. Please bring the original resident ID card to the ticket window of the station for identity verification. If the authentication is passed, the authentication result of identity information will be changed to "Pass"; If the authentication fails, the authentication result will be changed to "Failed".

Registered users "to be verified" cannot add common contacts (passengers) and purchase tickets.

"Pass" registered users cannot buy tickets for "to be verified" ordinary contacts (passengers).