1. Open WeChat and click a search icon in the upper right corner. 2. Enter the health code of this province in the search box, and there will be an application entrance for the health code at the bottom. Click it to open it. 3. Click on the statement of health code, and click on the application to allow the use of WeChat binding number. 4. After jumping to a new page, fill in the identity information as prompted. After filling in and checking, click Submit.