These are some of the author's insights in the research process (in fact, they are far more than these). Of course, what I feel most is the educational reform of the university, which is probably related to the author's "being there" for many years. In my opinion, the teaching methods, school-running purposes, educational ideas and human pursuit of the four tutors still have contemporary reference value today. In this sense, the four tutors are all "old" figures, but they are so "new"; They are in such a "change that hasn't happened in three thousand years", but there are so many "unchanged" and endless things, which is their enduring charm. Because of this, I always feel that the "four famous teachers" are not as far away as people think. They are still warning this materialistic era with their supreme integrity and perfect cultural conscience.