What does it mean that Qinghai health code appears after upgrading?

Qinghai health code appears in the mirror after upgrading, which means staying in one place for more than four hours. As of June 5438+February 65438+June, 2022, according to relevant public information, transit refers to staying in a place for more than 4 hours, opening the travel code with a mobile phone, and the system automatically records it as transit or visit.