How to modify the validity period of personal code

What if the personal code is invalid? Dear, it's because the validity period of the personal health declaration card 14 days has expired. Personal health code has expired. Click OK to return to the main interface of WeChat, click City Service, and then click Health Code to enter the applet. You will be prompted that the health code has expired. Click Update Now, fill in the health information, check I have read it, and finally click Submit. After the submission is successful, a new page will pop up, and click Generate Health Code Now.