We can cut in from this angle: Why do famous schools attract so many students and parents? Because famous schools have gathered a lot of educational resources: including software strength, teachers' strength and strong logistics team support; Teaching hardware teaching building, teaching AIDS, sports ground, library and other facilities are complete.

In order to maintain the study of a large number of students, the school must support the expenses of utilities, maintenance of fixed assets, salaries and bonuses of teaching staff, procurement of teaching equipment, renovation of teaching buildings and so on.

The four famous schools need to have enough resources to build efficient teams to meet the needs of improving students' learning, so where does the cost of supporting famous schools come from? On the one hand, it is the funds allocated by the higher education department, on the other hand, it is the social donations accepted by the school, as well as various expenses of the school (such as transfer fees and school selection fees). The unbalanced or absolutely average educational resources thus form the Matthew effect. The stronger they are, the more people will pay the school selection fee. In order to maintain a high-quality or efficient teaching team and produce high-scoring students, prestigious schools can only continue to charge fees.