Indeed, as upstairs said, most of the three schools have no classes in their student training plans (I only have two classes and 20 class hours in my junior year). At this time, some schools are organizing students to practice, and some people who plan to take the postgraduate entrance examination are preparing for the postgraduate entrance examination. Some people stay in the library every day, perhaps cramming for the upcoming final exam. Others stay in the library every day, probably chatting with two people, and even failed to get into the postgraduate entrance examination for the first time, preparing for World War II. There are many other reasons.