12306 indicates that there may be a problem with the network. Please try again. What should I do? It has been several days.

12306 indicates that there may be a problem with the network. Please try again, because there is no certificate. The solution is as follows:

1, open the website of 12306 with the top message on the home page, and click "root certificate" to download the certificate file.

2. Download the compressed package, open it directly, and double-click the "srca.cer" file.

3. Open the certificate installation screen, and then click Install Certificate.

4. Then click "Next" according to the certificate import wizard.

5. In the pop-up "Select Certificate Store" dialog box, select "Trusted Root Certificate Authority", and then click OK to return to the certificate import wizard screen.

6. Click on the home page of 12306 and the ticket entrance on the left.

7. Successfully entered the new ticket purchase screen. The address bar can also display encrypted lock and digital certificate information. Ok, now you can buy tickets online smoothly.