The health code is registered and generated according to your real-name mobile phone number. So it is impossible for your health code to appear on other people's mobile phones.
Health code is a citizen's real name registration, you can apply for exclusive health code according to the process. At present, with the unsealing of epidemic areas in COVID-19, all parts of the country have resumed production and schooling. Like ID cards, health codes have become an essential "artifact" for everyone to prove their health status. Wherever they go, they have to take their temperature and show their health codes.
With the launch of the national unified health code and the release of the national standard of personal health information code series, health code is expected to realize a "code", which greatly facilitates our daily life, work and travel.