You can't go back to the dormitory after a day's study. Because of day school. The dormitory will be adjusted and other students will move in. And the key card of the dormitory will be taken away. So if you can't go back to the dormitory after a day's study, there will be no place to live in the dormitory. It doesn't mean that you can live in the dormitory, and it doesn't mean that you can stay in the dormitory. This is impossible and the management will not be so chaotic. As long as you do, you can't go back to the dormitory without a residence card.