Compulsory education in senior high school may not be suitable for some students. Some students can't keep up with their studies in junior high school. After graduating from natural junior high school, you will either go to vocational high school or go to society. Even in high school, students can't keep up with their studies, which wastes educational resources and makes students miserable. Moreover, at the age of high school, students have reached puberty, rebellious period, impulsive, and potential dangers are likely to occur in school in order not to study.