1. Stability of social circle: For most people, college is the last stage on their journey to study, which will last for four years. In these four years, their classmates or brothers and sisters will be the most frequent group of friends in the future society, even their superiors and subordinates. Therefore, in college, I put this part of my social circle in the most rewarding part. 2. Professional knowledge (skills): Maybe not every department has the so-called knowledge or skills, but some people say that interlacing is like a mountain, which means that every department has its own professional knowledge. Therefore, in the past four years in college, every course you have studied and every research you have read has become the basis for you to accumulate relevant professional knowledge and apply what you have learned through practice. 3. Determine your future direction: Many people actually dream of becoming a professional when they are very young, so when they go to college, some people still use these four years to work and participate in some activities. Reconfirm your future career and direction through activities. 4. Self-life management: In fact, during the four years of college, many people left themselves to study abroad. A person living in a foreign country, in addition to the most fundamental living expenses, there is also a grasp of self-time. In the past, at home, elders would ask themselves to go to bed early after midnight, and if they were addicted, they would teach them a few lessons. But living alone, no one will ask you to go to bed early after midnight. If you indulge in fun, no one will miss you, so it is more important to learn how to control your time and use your living expenses. Many people's financial experience mostly begins with four years of college. In fact, everyone's gains are different, mainly depending on what kind of mentality you use to live these four years again, and everyone is different. Therefore, the harvest will be different. After graduation, I felt strongly how unforgettable my campus life was. Looking back, I found that I didn't do many things, wasted my time and youth, but also gained corresponding value. I remember Yu said: College is to make friends, fall in love, and then read books by the way.