"Two cases and nine systems" refers to the epidemic prevention and control work plan, the novel coronavirus epidemic emergency plan, the reporting system of infectious diseases and public health emergencies, and the morning and afternoon inspection system for teachers and students.

1, two cases: epidemic prevention and control work plan, and novel coronavirus epidemic emergency plan.

2. Nine systems: reporting system of epidemic situation of infectious diseases and public health emergencies, morning and afternoon inspection system of teachers and students, registration and tracking system of students' absence due to illness, review system of resumption certificate, student health management system, emergency vaccination system, health education system for prevention and treatment of infectious diseases, ventilation and disinfection system, and notification system of environmental sanitation inspection.