Some colleges and universities stipulate the professional grade difference when assigning majors, which refers to the difference in scores when enrolling non-first major volunteer candidates. For example, a school stipulates a professional grade difference of 4 points. When the school assigns majors, it subtracts 4 points from the scores of candidates who volunteer to fill in the second major, and ranks with candidates who volunteer to fill in the first major to determine the major.
At present, some universities have cancelled the professional grade difference. For example, there is no professional grade difference in the university. The first major volunteers to fill in a professional candidate A, and the second (or other) major volunteers to fill in a professional candidate B. As long as their scores are the same, the competition opportunities are the same. If B's score is higher than A's, then B has a better chance of admission than A ... This is a policy of giving priority to scores, which can help candidates with high scores, reduce the risk of volunteering and rush to the major they want to attend.