Use. As of December 24, 2022 query related information shows. Harbin belongs to the epidemic normalized control area. Harbin dining hall food is required to prove the nucleic acid, you need to show 48 hours of nucleic acid negative proof. Harbin dining hall food is a very large population flow places, in order to ensure the safety of personnel, so the need for personnel to show 48-hour nucleic acid proof. To do a good job of personal protective measures, wear a good mask.