I can't say exactly where the focus of modern history is, because this is a newly-opened major, and the latest exam is just a set of questions over the years. You won't search the whole network for too many topics, so you won't get the most important points from the proposer, which is obviously different from Mao's principle and political economy, because both of them have been tested for n years, and everyone knows exactly where the so-called points are.
But the focus is the focus for anyone, whether it is the proposer or our examinee. In my opinion, the focus is nothing more than the memorabilia in China's modern history: two opium wars and several wars of aggression (Sino-French war and Sino-Russian war), several peasant uprisings, the Revolution of 1911, the establishment of the China * * * production party, the national revolution, War of Resistance against Japanese Aggression, the war of liberation, socialist construction, reform and opening up, and of course many others.
If you are interested in history, you should find modern history very easy, which is all left by junior high school; If you hate history, it's very simple, that is, learning according to the chronological order of events, just like reading novels, which is very interesting. If you feel that there are still some missing points in your study, you can buy some tutors to do it. I prefer Yan Yuan and Yi Kao Tong. The advantage of this is that you can quickly master the test sites and pass the exam quickly.
I hope I can help you. Good luck in the exam in April!