The more solid the review, the greater the chance of success. Review has its merits. I want to know what your plan is now. I recommend you a website: Postgraduate Entrance Examination Forum. There are things you want and things you don't expect.
The teacher's treatment is ok, not bad, not bad. I have never heard that teachers make a fortune by salary, and I have never heard that teachers are too poor to eat. Yes 13 months' salary.