At present, the epidemic in Chengdu City, Sichuan Province, has been brought under control, there are four other medium-risk areas, 4 +1 new cases yesterday, the greater Chengdu area has been unsealed, the districts, cities and counties can pass each other, the order of life and production has been restored, but just need to pay attention to is the need to travel to ensure that the 72 hours of nucleic acid negativity, so as not to bring unnecessary trouble.