College life is very free. We can do what we want, but we have to pay the price for our actions. Nobody will care about you. You must do everything by yourself. You can choose to spend four years in this university in a bohemian way, or you can choose to spend four years in a highly disciplined way. Everyone has his own way of living, but the result is different.
In high school, if you don't study hard, the teacher will take care of you and the parents will take care of you. But in college, if you don't want to study and indulge in playing games all day, the teacher won't talk about you, but in the end your final report card must be the result of failing this course. Of course, you can also choose to study in the library in the university. Maybe you will live a dull life for four years, but the final surprise will definitely make you cry. This is the charm of the university, and you will get what you pay.
Secondly, interpersonal relationships in universities are relatively complicated. Most of us make friends with student clubs through clubs. If you don't join any clubs, the last person you know is probably your roommate. People who call you brother are not necessarily good friends, but may just use each other's partners. University is the epitome of a society, but it is not as sinister as society, but everyone will learn a lot about being a man and doing things in this big dyeing vat.