Transfers in Changsha that do not exceed 4 hours do not count. Transfers longer than 4 hours will be recorded in your trip code and big data will show the length of stay. If you take the public **** transportation that stops in the area involved in the epidemic and there is a risk of community exposure, then it is a history of sojourn; if there is no epidemic in the transportation site, and you are only exposed to the transportation site and are effectively protected, then it is not a history of sojourn, in principle.