(2) Chen Wendeng's whole book review is a little more difficult than Li Yongle's, but I think Li Yongle's whole book review is difficult enough. I still suggest that you do Math III, because the test scope of Math I and Math III is somewhat different, so doing Math I may be somewhat misleading!
(3) In fact, the postgraduate entrance examination questions are not difficult, but the calculation amount is large, so we should focus on practicing the calculation ability at ordinary times and don't sell ourselves short.
(4) The real math problem is very important, so we should study it well.
Finally, I didn't start preparing until the next semester of my junior year. The battle line is too long, and I get tired easily! Most importantly, once you choose to start, you must stick to it. Wish you success! Haha's laughter ...