You can also take the QR code directly to the window to register, pay fees, scan the code to report, and get the certificate. Old people do have some confusion when using electronic health cards. Many people are usually accompanied by children, and children can do it with smart phones, but children are often busy with work, and some are still working in other places. In this case, the patient's children are usually asked to take a screenshot of the QR code of the electronic health card and download it through the computer, print it with good quality paper and stick it on the hard card or the original medical card. If the elderly come to see a doctor again, once their children are busy with work and have no time to accompany them, they can directly take the printed QR code to see a doctor, or they can directly take the QR code to the window to register, pay fees, scan the code to register and get certificates.