1. Inform parents in time: the head of the school should immediately inform parents of this situation, explain that bugs have been found, and apologize to parents. Notice can be made by class notice, parent-teacher meeting or other appropriate means.

2, explain the reasons and treatment measures: the director should explain to parents the reasons for the emergence of insects, which may be food problems, improper storage conditions and so on. At the same time, the director should explain what measures have been taken to solve the problem, such as changing food suppliers and strengthening food storage management.

3. Accept parents' opinions and suggestions: The Director should listen to parents' opinions and suggestions and express his willingness to improve and strengthen food safety management. Parent-teacher conferences or special feedback channels can be organized for parents to express their opinions and suggestions and respond positively.

4. Strengthen food safety management: The director should strengthen the selection and supervision of food suppliers to ensure the quality and safety of ingredients. At the same time, strengthen the norms of food storage and handling to ensure food hygiene and safety.