November 27, 2022 start Changchun City notification of silent control for 5 days. According to the query related information shows that Changchun no indigenous epidemic areas epidemic prevention and control policy requirements have such points, reporting in advance. Hold nucleic acid within 48 hours. Landing nucleic acid testing. Arrive in Changchun less than 5 days non-essential not to go out. Cooperate with outbreak control measures. Report in advance to hold the 48-hour nucleic acid landing nucleic acid test with the relevant epidemic prevention and control measures.