After walking around for a long time, I suddenly felt that Weihai's class was not good anymore. Suddenly I realized a profound problem, that is, my view of "what is good information" all along.
From Chen Houjin of Beijing Jiaotong University, to Tsinghua Zhuoqing, to Dongdameng Bridge, and then to Beijing University of Posts and Telecommunications Li Weihai, after listening to it for a long time, I always feel that the current class is not good. After looking for a new class for a long time, I can understand it and take it for granted. This new class is easier to understand than the previous one.
I recalled that Feng Youlan criticized a hundred years ago for being far away and inferior, noble and inferior to the present, and foreign books on Douban are always better than domestic ones. It is nothing more than domestic books that played the role of this first book. Backed by readers with incomplete knowledge systems. In other words, because foreign books are often associated with higher-level readers (whether they have already learned relevant knowledge or read recommended textbooks at the beginning), foreign books show higher evaluations? Although this is not the main reason, it cannot be denied that foreign textbooks tend to be closer to the lectures and may be more plain, but it is not that all domestic textbooks cannot get 9 points. For example, Gu Qiao's mathematics was not as good as the teacher Wu who brought the lecture record. There is no need to wear colored glasses when choosing. If you put this foreign textbook for the first time, you may not think it is great.
As a method, it is difficult for us to read the same book twice with the same teaching . This is a very real problem, so we need more reference books to understand the problem from multiple angles. The first book is best to use simple examples (that is, not to be immersed in a relatively long chain of thought to affect the understanding of knowledge itself), which can help us understand the general logical relationship of knowledge .
There must be differences between books. Choosing a good book as the first will definitely save a lot of effort.