With all due respect, if you want to learn information security and further your studies in the future, then go to a good school and major, at least one, preferably 34 universities in 985. In these schools, you will find that you have benefited a lot in all aspects. And 400 points is not enough. Try harder and get more!
If you don't do well in the exam, you can review for one year. As long as you have aspirations and ideals, one year is enough to study for three years.
May your dream come true!