Paper version of the health certificate is generally held by individuals, the use period is generally one year, and the physical examination is conducted once a year to ensure that the health status meets the industry requirements. In some cases, the paper version of health certificate can also be used as proof of identity.
It should be noted that different regions and industries may have slightly different requirements for health certificates, which shall be subject to relevant local regulations. In addition, with the development of science and technology, electronic health certificates are becoming more and more popular, and can be easily queried and used on the Internet.