At present, there are four formats of health certificates in our city, seven health knowledge training institutions, and about 20 institutions that can apply for certificates. It is understood that in addition to the use of magnetic cards by the Municipal Health Supervision Office and the Municipal Center for Disease Control and Prevention, among medical institutions, Huli District and jimei district Center for Disease Control and Prevention issue green paper health certificates; Siming district health supervision issued a white health certificate; Haicang District Health Supervision Office issued a green health certificate. The above four formats are only a rough distinction. In fact, according to the different issuers, there are differences in various formats of health certificates. For example, the number of paper seals issued by medical institutions is different from that issued by Huli District and jimei district CDC. Even the health certificates issued by the same institution within a few months are different. So generally speaking, there are nearly 20 versions of valid health certificates, which can be described as various and different styles.