The so-called unity and cooperation means that people unite, support each other and cooperate closely in order to concentrate on achieving common ideals or tasks. This meaning tells us that the collective refers to a consortium organized by people with common interests according to certain interests. Teachers live and work at school. The relationship between a teacher and an individual is like the relationship between a person's cells and his body. Every cell can only survive and develop in an organism. Because the collective is the condition for an individual's survival and development, his wisdom and talent can only be improved and developed in the collective. As the famous scientist Qian Xuesen said, "Modern scientific and technological research cannot rely on one person's labor ... 95% of scientific and technological research depends on the collective ... It is lifeless to fight alone." Only in the collective can we cooperate with each other to produce great strength, so that individuals can. Only in the collective can individuals achieve all-round and free development. Because the all-round development of individuals must be based on accepting and utilizing the achievements of material civilization and spiritual civilization created by predecessors or others, and the all-round development of individuals must also rely on the strength of social collectives and participate in various social practices, and constantly transform and improve themselves while actively transforming the objective world, thus gaining freedom. Therefore, the basic principle of socialist morality is collectivism, which requires people from all walks of life to love the collective, unite and cooperate.