In fact, it doesn't matter which textbook is used for postgraduate entrance examination, just like the mathematics textbooks in different provinces in the college entrance examination, but the exams are similar. If recommended, it is recommended that Tongji's high number be used more. China's economy and trade is the third, which is relatively simple. If you want to learn well, I suggest doing Jimmy Dovich's mathematical analysis problem set. This is very difficult. If you know this, you will have no problem at all.