The location of your dormitory will inevitably be lost. I wanted to say that you can get rid of what you left behind inadvertently, or damage it several times, and then complain that there are too many people coming and going, and you have to take responsibility, which is an excuse. As for the borrower, it can be said that someone made an appointment before him. Next time, ask him to make an appointment at least three to five days in advance, and fill in the appointment form (write one yourself, including the borrower's name, borrowed items, item evaluation, borrowing date, return date and dormitory number. If he doesn't return it at that time, he will voluntarily compensate according to the evaluation and liquidated damages. I will sign, fingerprint/post this form where he can see it when he enters the dormitory. But it's interesting to think about it. So I suggest you change your dormitory.