First of all, the health code is a sign of a person's health. We should register a new one with our phone number, ID card and home address. Then, a health code, and then the health code should be input into your own photo. You can enter the photos taken before and saved in your mobile phone. You can also take photos with your mobile phone at that time and record them. Finally, if you want to change the photo of the health code, you should first delete the original photo, then take a new photo, and then change the photo.