Math of Grey Rabbit, Data Analysis of Peanut Thirteen, Logical Judgment of Wolong Light, Speech and Common Sense for the time being.

What you can't do after listening can only show that the course is not good. His examples are very special, and they are all aimed at problems.

A really good course is a universally applicable method. And after the course, I can use it myself and learn ideas.

If a teacher only talks about methods, most of them are aimed at special problems. Of course it will give you a feeling. Wow, good method and good speech.