If you want to take an interdisciplinary examination, you should first consider how much foundation you have laid in the major you are really interested in in in the university, the major you want to choose, the annual competition in the selected target institution, and the strength of your competitors. These factors need to be considered by interdisciplinary graduate students.
Generally speaking, the review time for one's own postgraduate entrance examination is about one year. When reviewing this year, it will be more difficult if you take different majors, from unpopular majors to popular majors, or to completely unrelated majors.
If you want to take an interdisciplinary examination, you must consider whether the knowledge of public and professional courses and the learning tasks to be completed can be completed within one year. If you want to take an inter-major exam, you can't just rely on enthusiasm and courage, but also look at the reality of your ability.