First of all, your personality determines how wide your circle is. If you are an introvert, you should take part in more activities, especially standing in front of many people to show your activities, such as speech contests and debate contests, which may be a bit difficult. You can start from the basics. If you are naturally talkative and have a good mind, what you lack is experience and platform.
There are many platforms for interpersonal communication in universities, which organizations such as the Youth League Committee and the Student Union can join, and these are relatively perfect school organizations, where you can meet many people with the same goals as you, learn from each other, compete with each other, improve yourself in such a fierce environment, and make many friends.
Besides, it is necessary to do some part-time jobs. Let me tell you an example around me. One of my former ministers took a part-time job in college, and my friend bought a car for only three years, which became the object of our discussion for some time. Now they have also got a marriage certificate and will graduate soon. In college, you can't see that he is a student at all, but more like a social person. That is the result of social tempering.
University is the best time in life, don't stay in the dormitory all the time. If you want to make academic achievements, go to the library more often; If you want to step into the society, you must establish your own circle.