Why can't some fire certificates be used?

It is due to expired certificate, non-compliance or illegal operation.

1, the fire certificate has a certain validity period, and the certificate has expired. According to the requirements of laws and regulations, the holder will need to update the certificate, otherwise the certificate will no longer be valid.

2. The holder of the fire protection certificate needs to comply with the specific operation specifications and safety requirements. If the holder violates the relevant regulations, such as improper operation and unresolved security risks, the certificate will be invalid.