Papers from Shandong, Jiangsu and Guangdong are all of high level. Jiangsu is not recommended. For everyone, this is generally beyond the scope of knowledge Generally speaking, the foundation is the most important. If you are close to 150 in math, you can go and see some Olympic Games to improve your skills. If not, we must grasp the foundation. Don't underestimate the foundation. Even the average person can't do it well. Don't aim too high ~ ~ ~