The filing line is naturally formed after the candidates apply for the exam according to the enrollment plan and are finally admitted.
The score of the student with the lowest score admitted to a university in a province is the filing line, rather than the university setting a score first and enrolling according to this score.
So there is no such thing as what you asked in your question, but the investment line of the same university in different provinces is really different, high or low, which depends on the difficulty of examination questions in different provinces, the number of enrollment plans, the number of candidates, the differences in regional cognition and so on.
hope this helps