Not difficult. It is not difficult for the Three Gorges University to retake the exam, and the score is higher, because I am not satisfied. If the middle school students in Three Gorges University fail or their grades are relatively low, it may affect the scholarships, grants, promotion in the league and joining the party in the next academic year. In order not to affect these projects, they can get higher scores by retaking the exam, but the tuition of this course needs to be paid again.