I come from Xi 'an. At the time of the 26-year senior high school entrance examination, I almost got the olympiad. Fortunately, I studied for two years, and I'm still 26. I don't know. I took part in the Olympics at that time, not bad. It's been two years, and I should still take the exam. You'd better learn olympiad. This is a good location. Landing point: just look at 1. Chickens and rabbits in the same cage II. Parallelogram 3. Solve equations (one variable, two variables). This is my advice to you. Do well in the exam and get into the key class.