The hospital changed the health code information. 1. Find the health code plan on the page. How to change the mobile phone number of health code? 2. Select your city in the health code plan, and then click the "View Now" button. 3. Drop down the health code page, find and click the information update button. 4. Click the Update button in the pop-up prompt. 5. Enter your mobile phone number at the mobile phone number on the information filling page, and then fill in your location information. 6. After filling in the form, check the informed consent option and click the button to activate the code.