Zhang Yu's eight sets of papers and four sets of papers will be more difficult, but the idea of writing questions is very good

Zhang Tiande's original mathematical proposition group of six volumes is also acceptable.

If you review the whole book, you can buy Li Yongle's 6+2.

If you watch Tang Jiafeng's video, you can buy eight volumes of Tang Jiafeng. It's not that difficult.

Look at yourself. You need to get high marks. You can also look at Li Zhengyuan's final exam.