What does M260 1-8 health code mean?

M260 1-8 is the emergency yellow code for people entering Sichuan in Zunyi City and Guiyang City, Guizhou Province in June, 2022 1 day and later. Health codes are divided into three categories: green codes indicate that there is no abnormality and they can pass normally; The yellow code indicates the need for investigation or family health monitoring; Red team said that isolation treatment should be carried out in designated medical institutions.