The health code is registered and generated according to your real name and mobile phone number, so that your health code will not appear on other people's mobile phones. Now that you have applied for health, the health code information still exists, and he will not make any changes according to your mobile phone number or mobile phone number, because the health code information applied for by the real-name registration system will not change.
Health codes are based on real data and can be declared by citizens or people who have returned to work online. After background audit, a personal QR code can be generated, which can be declared once as an individual in and out of electronic certificate, and is universal in the whole city.