Teacher Zhu's video is persuasive, nuanced, and has superb skills in teaching. See the sun through the clouds, suddenly enlightened, meet each other late, value for money! I think Zhu Lao should know more about pedagogy or educational psychology. Because I bought a full set of videos of Wei Dongshan and Guo Jian a year ago, I couldn't stand it and couldn't hold on. I felt in a fog when I was listening to the class. But after watching Mr. Zhu's free video, I basically feel that my thoughts can keep up.