Hehe, they are betting on probability. Students who have passed the class (in fact, it should be called the agreement class) will start enrolling students after the interview list comes out, and only those who enter the interview list will enroll students.

There is only one person for a position, and only three people are on the interview list. The probability that these three people are finally admitted is one-third.

Even if the last two-thirds fail, they will be refunded, and finally the training course will be profitable as a whole (the tuition fee for one person is more than 10 thousand).