This should be analyzed in detail. According to the rules and customs of primary and secondary school students, it is impossible to do this in primary and secondary schools, which is extremely unfavorable to the growth and development of class teachers and students. If it is above the university level, first of all, laws and regulations, school rules and regulations do not explicitly prohibit such things. Secondly, both of them are single and do not violate good customs and social morality. Third, if they communicate and establish feelings within the normal range, do not be selfish in public affairs in the class, do not take sides because of feelings, and can treat each other equally, fairly and justly, then the relationship is permissible. As long as they are emotionally healthy and can treat each other rationally and objectively, they all meet their own mate selection criteria, and they are still relatively happy. In fact, some people in society will miss a marriage because of the influence of some traditional ideas or work differences, which is unnecessary. It is possible to analyze properly and comprehensively, without affecting others, work, rules and ethics. As long as they are happy, the position gap and class gap can still be ignored within a proper range.