What does it mean to query the avatar sometimes pink and sometimes blue with health code?

When a pink box appears in the health code, you should pay attention, indicating that you have passed through some sensitive areas, indicating that you are isolated at home. We can't let our guard down. You may have been infected or cured, so there is a risk you must pay attention to. Otherwise, the normal health code is green instead of pink, and pink means that you have been infected or are very dangerous close contacts.