Start time of Tianjin in spring of 2022: 1, primary school: from April 25th; 2, junior high school: April 25, the first day of the second day; Grade three, April18; 3. High school: April 25, senior one and senior two; Senior year April 25; 4. Kindergarten: From April 25th; 5. Secondary vocational schools: from April 25th.

Under the unified organization of the local epidemic prevention and control headquarters, all primary and secondary schools should strictly implement the National Health and Wellness Commission's Technical Plan for Epidemic Prevention and Control in COVID-19, the Ministry of Education's primary and secondary schools, and the Municipal Prevention and Control Headquarters' Notice on Printing and Distributing the Work Plan for Comprehensively Strengthening COVID-19's Epidemic Prevention and Control in Tianjin Education System, implement the sampling ratio, frequency and range of teachers and students' nucleic acid testing, strengthen the monitoring and early warning mechanism, and do a good job in the normalized epidemic prevention and control after resuming offline teaching.