16 Before the postgraduate entrance examination, many people were full of praise for the complete works of Li Yongle. At that time, it was said that Zhang Yu's question was too difficult.
16 said after the postgraduate entrance examination that the real questions of Li Yongle's complete works were too shallow, and Zhang Yu's questions could dig the essence of mathematics.
16, Zhang Yu became the biggest winner of the mathematics postgraduate entrance examination. His question is more difficult and obscure. 16, math problems are more difficult, so students who use Zhang Yushu are more calm when facing the exam.
My personal suggestion is, take math one, remember the previous foundation of high mathematics, and use Zhang Yu.
I forgot the basics of mathematics before, so I used Li Yongle.