Is it easy to enter Xiamen for self-entertainment?

They are four levels ABCD. According to the compulsory subject grade calculation method, Level A is 100 to 90 points, Level B is 89 to 75 points, Level C is 74 to 60 points, and Level D is 59 points and below. According to the elective grade calculation method, the original score of each subject is 120 points, which is converted into the corresponding grade in proportion according to the candidate's score. Level A is the top 20% including 20% ??of the candidates, the top 5% is A, Level B is the top 20% to the top 50% including 50% of the candidates, C Grades include the top 50% to the top 90%, including 90% of the candidates, and Grade D refers to the candidates after the 90%.