After graduation, students will not be notified in advance to check the papers, that is, the selected papers will be sent anonymously to the review experts. After the spot check, if there is nothing wrong with the selected papers, the students themselves will not be told. It can be said that students themselves won't even know that their papers have been spot-checked, and they won't be told unless they find that the problems are bigger. As a professor who has participated in random paper review for many times, when I received the invitation for random paper review, I only knew which school and which major the paper was, and who the author and tutor were completely anonymous, thus avoiding my judgment bias that might be caused by acquaintances.