The health code is no longer displayed after two days.

If the health code is more than two days old, the health code will not be displayed. Because it has exceeded the validity period of the personal health declaration card 14 days. Personal health code has expired.

1. Click OK to return to the main interface of WeChat.

2, click on the city service, and then click on the health code, enter the applet, here prompt health code has expired.

3. Click Update Now, fill in the health information and check that I have read it.

4. Click "Submit", and a new page will pop up.

5. Click Generate Health Code Now.