Specific steps:
1. Open WeChat in your mobile phone, click the menu "WeChat" and click the "Search" icon in the upper right corner.
2. Enter the keyword "Beijing Health Treasure" in the search interface to enter the "Beijing Health Treasure" applet.
3. After entering, enter the authentication interface, enter your name and ID number, and click "Start face recognition verification".
4. Click "Next" in the face recognition information confirmation interface to confirm that it is my operation, and the screen will flash when face recognition is performed. Click "Continue".
5. After the face recognition authentication is successful, enter the page of Beijing Healthcare applet, click "Health Status Query", and click the QR code icon above to display the Beijing Health Code.