If the child is not accompanied by parents and the teacher takes him to class, some requirements will be strengthened according to the standards of kindergarten. Kindergarten can't be in the basement or above the third floor, so it can't be on the fourth floor.

If every child is accompanied by an adult in class, it is not strictly controlled.

Mainly considering that children's evacuation ability is very weak, it is difficult to escape in the disaster. There is no such worry when accompanied by an adult.