China University adopts the grade point system to calculate the scores of all subjects, and grade point is a comprehensive index to measure students' learning ability and quality. GPA system calculates the total GPA according to the weighted average of credits. Credit refers to the academic performance of each course, and GPA is calculated according to students' grades and credits. Under the GPA system, generally, a score of 90 or more corresponds to 4,0 GPA, a score of 80-89 corresponds to 3,0-3,9 GPA, a score of 70-79 corresponds to 2,0-2,9 GPA, and a score of 60-69 corresponds to 1, 0- 1, 9 GPA.