If the city's education resources can be fairly distributed among different schools, then there will be no difference between key schools and ordinary schools, and there will not be some teachers who are "rich" because of the excessive accumulation of education resources. If education resources are in regions With fair distribution among them, mountain village schools in remote areas can get more input, then rural education will not be so difficult. This text mainly talks about:. ['Fairness of educational resources.', 'Polarization of teacher income.', 'Regional disparity in the allocation of educational resources.', 'Hierarchy of schools.']