When you return to school, first of all, you should cooperate with the management for temperature testing, avoid touching the handrails when going up and down the stairs, and try to touch the objects in public areas as little as possible. Reduce the time spent in crowded or poorly ventilated public areas, such as corridors, restrooms, etc., and wear a mask properly during your stay. Try to open windows in the classroom for ventilation, reduce the passing of paper materials, use disposable gloves or disinfect hands well when handing over frequently, and protect yourself. Students who are in a position to eat in the cafeteria, it is recommended that they prefer to bring their own box lunch, which can effectively avoid bunching of meals, and the meal cutlery hygiene is more secure.