Grade difference means that when a school enrolls a non-first volunteer candidate, the student is higher than the first volunteer candidate who has been admitted and admitted. This score is the grade difference of the school. Generally speaking, the grade difference of scores ranges from a few points to dozens of points.

The scoring range is divided into poor school volunteer scoring and poor professional volunteer scoring. The difference in school volunteer grade refers to the difference in scores when enrolling non-first college volunteer candidates, and the difference in professional grade refers to the difference in scores when enrolling non-first professional candidates. The implementation of grade differences makes students more rational when choosing schools and majors, and also meets the needs of colleges and universities to recruit high-quality talents.