A health certificate is usually issued by the health department or relevant units to prove the personal health status and meet the relevant health standards. Not all health certificates will be numbered. Some areas or hospitals may number health certificates, but some places do not use numbering. If there is no number on the health certificate, you can contact the local health department or relevant units and ask them for the specific information of the health certificate and the replacement process. For the electronic health certificate, you can go to the hospital and provide personal ID information. They can get the health certificate number through the system query.