When the system is not open for business or the system is under maintenance and upgrade, the official temporarily closes the certificate verification system. In this case, users can wait for the system to open before re-verifying.

2. There are too many users at the same time, and the system is busy. Users can try to switch the browser login again, or they can change the number of people for less time.

3. The certificate is not within the valid range. Check whether your certificate is qualified, whether it is within the validity period, or whether it has been stamped and confirmed.

There may be other reasons besides the above, and the specific solution can be consulted by Hebei Provincial Bureau of Human Resources and Social Security.