I. It's easy for teachers to envy students, causing them to fail their courses and thus increasing the family burden. Many university teachers had relationships when they were college students, and during the passionate times, they suffered from the inability to stay in hotel rooms without a marriage certificate, which caused serious psychological harm. Now, suddenly seeing a bunch of young kids flaunting their marriage certificates and enjoying staying in hotels, it's inevitable that jealousy arises. When grading exams, they are especially harsh, causing many students on the edge of passing to fail. Moreover, many universities have implemented a system where students who fail exams must pay to retake the course (some universities charge 100 yuan per credit for retaking a course, and subjects like higher mathematics and foreign languages often have 6 credits). If too many courses need to be retaken, it can lead to financial ruin, adding even more burden to families who are already struggling!