1. Incomplete certificates: When submitting certificates, some users will miss some certificates, resulting in authentication failure. If some users forget to submit their student ID cards, the authentication will fail.
2. Incorrect certificate information: When some users submit certificates, the information on the certificates is inconsistent with the actual situation, such as name, certificate type, certificate number, etc., which may also lead to authentication failure.
3. Network problem: During the authentication process, if the network connection is unstable or the system is busy, the authentication fails.
4.JD.COM system failed: JD.COM education preferential certification system failed, and users could not complete the certification.