Railway 12306 client certificate is wrong, how to solve it? What is the reason?

When using Railway 12306app to purchase tickets, sometimes there will be a prompt that the client certificate is wrong, so you can check whether the time setting of the mobile phone is accurate. The reasons and solutions are as follows:

This prompt appears because the mobile phone time corresponds to the network time. You can try to open the settings of the mobile phone, turn on the flight mode and turn it off, and then re-enter 12306 to search normally.

2. It may also be that the access capacity of 12306 website exceeds the space tolerance of the website. Because there are many people grabbing tickets on 12306 during some holidays or during the peak period of ticket purchase, the server will not respond.

3. You can also try to buy tickets during off-peak hours, or use the website to buy tickets.