The admission of doctors is largely determined by the tutor. Because at present, some universities in China have regulations that if a doctor does not graduate smoothly, he will be disqualified from recruiting doctoral supervisors within two years. Therefore, it is obviously more appropriate for doctoral supervisors to choose who to recruit. Moreover, doctoral training needs funds, which need to be paid from the doctoral tutor project funds. Therefore, in order to maximize the academic output of the doctoral tutor fund, students with doctoral tutor potential must be selected.