Extensive social interaction among college students does more harm than good for three reasons. First, the so-called "extensive" in the "Old Chinese Dictionary" refers to a large scope and a wide area. I would like to ask if the opponent's debate partner "three religions and nine schools of thought, and friends with friends like foxes and dogs" are also in this range? The great revolutionary teacher Lenin once said, "Study, study, and study again," but he never said, "Socialize, socialize, and socialize again"! The all-powerful mathematician Poincare gave a speech on "Life is Continuous Struggle" during the 20 days before his death, but why not say "Life is Continuous Social Networking". Second, college students’ extensive socialization inevitably involves dealing with society. Modern society is complex, and interpersonal relationships are even more diverse. Where there is sunshine, there will be shadows. College students are not yet mature in terms of psychology and physiology, and have no social experience. I would like to ask, how can we, who are new to the world, use our immature eyes to see clearly the other side hidden under some seemingly "kind" appearances? Criminals in society take advantage of college students' immaturity to make friends with them, thus inducing college students to commit crimes and setting them on a path of regret. What a misstep that will lead to eternal regret. Isn't that sad? In recent years, the crime rate among college students has been on the rise. In 2002, it was reported that 85% of teenagers who committed crimes due to careless dating were boys and 74% were girls. Such an astonishing number will not make us sigh where are our mother’s good children? Where have the pillars of the country gone? Third, from a materialist point of view, there must be a limit to everything you do, otherwise you will suffer enough. Chemistry tells us that hydrogen cannot be friends with air without limit, and mathematics tells us that a certain sequence also has this limit. Life tells us that social interaction has its limits. Liu Qing said that although the road of life is long, the most important steps are often only a few steps, often when people are young. To sum up, it fully proves our point of view that extensive social interaction among college students does more harm than good