What about loss of appetite on the eve of postgraduate entrance examination?

This is caused by your excessive tension ~ ~ ~

Try to relax and breathe fresh air ~ ~ ~

If I were you, I would review less and read less books the night before, because although the exam is very important, at that point, the more I read, the more I review, the more nervous I get. Maybe you don't admit that you are nervous, but this pressure is invisible. It's the pressure you inadvertently put on yourself. No matter whether your grades are good or bad, I suggest you relax and watch TV before the big exam. Everyone has his own way.