1. Plan ahead: Schools need to make plans in advance, including food procurement, storage, processing and distribution. We must ensure adequate food supply and take appropriate measures to keep food fresh and safe.

2. Schools can make lunch boxes and distribute them to students to eat outside the canteen. This requires canteen staff to have the experience and ability to make lunch boxes, and to ensure the quality and hygiene of lunch boxes.

3. Limit the number of people: Schools need to limit the number of people eating in the canteen to avoid the risk of crowd gathering and cross-infection. You can control the number of people by eating at different times and eating at different peaks.