Because my mother is a kindergarten teacher, after asking her, she told me that in order to ensure the cleanliness of books and prevent bacterial infection after many children contact them, kindergartens will regularly disinfect kindergarten books, spray alcohol on them and take them to the sun to dry. Moreover, during the epidemic, in order to ensure the health of every child, the number of books will be more frequent, about once a day. We still attach great importance to the safety measures and environmental cleanliness of kindergartens.

The above is my answer, I hope I can help you! Thank you~