Postgraduate entrance examination subjects are four specialized courses of political English (Math I in science and engineering, Math II in liberal arts from school (Math III), and specialized courses from school, of course, some majors don't take math test).
Lay a good foundation of college political English and read more books that you want to take in your spare time.
Nowadays, college graduates have many kinds of jobs. What enterprises need are talents with excellent professional knowledge and strong comprehensive ability. Different positions focus on these two aspects. If you lay a solid foundation in college, you can't find a good job.
As for the study in college life, as mentioned above, it is not only the study of knowledge, but also the improvement of skills, so we should pay more attention to our own abilities. A person's personality charm is far more important than professional knowledge.