Why don't you always tell us to quarantine in green code?

Health code is a personal two-dimensional code formed by real data. In general, the green code of health code does not need to be isolated, because the green code represents safety. Generally, in low-risk areas, only the green code of health code can pass normally. If the green code of health code is still isolated, it may be because people in all areas need to be isolated when the area is a medium-high risk area or a closed control area, even if the health code is green. In addition, the epidemic prevention policies in different regions are different. Even the green code needs to be isolated if it meets the isolation conditions.