The health code is bound to your own identity information, which depends on your own health and travel situation, and whether you contact other people.
From June, Henan Province will realize the integration of bus card and health code information. After the information integration of "card-code integration" in the whole province is completed, you don't need to show your health code as long as you have an old-age card and a student card registered in real-name registration system. When you swipe your card to take the bus, you will automatically check the status of the health code and the boarding code, thus realizing the integration of the card code.