Normally they are closed. But it depends on different school policies and which level the school belongs to. For elementary school and junior high schools, certainly more than 90% will be on vacation, so the school has no one, the school cafeteria is certainly also on vacation. But the university is different. First of all, many universities are privately contracted stalls. It's equivalent to opening a store outside. Generally rarely closed. Even if the National Day many students go back. Some students will be too far away from home also choose to stay in school, and there are graduate students and teachers and other permanent population of the school. So the university cafeteria is generally in a short period of time on holidays is not a vacation