Print an electronic health card, can I use it every time?

No, the printed electronic health card has a validity period, and the validity period of printing the health code once is 14 days. The health code is transcoded according to personal health status and punching, and the "green code" is valid for three days. During the validity period, citizens must complete health registration at least once before they can get an automatic extension, otherwise they will be turned into "yellow code".