1. Open the Healthy Nanjing APP.
2. Click "Settings" on "My" page.
3. Click "Account Settings" on the "Settings" page.
4. Click "Change Mobile Number" on the "Account Settings" page.
5. Finally, enter the new mobile phone number and then enter the login password to change.
If you can't log in with your mobile phone number, you can try to log in with your ID number.