Dialogue between Xu Wenbing, Liang Dong and Huangdi's Internal Classic: Four Qi Regulating Spirit (Chapter VI).

Chapter 6 1 When studying Huangdi Neijing, you must be able to think of the other side of it. When we look at a word, we should think of its antonym. If you think this sentence is not easy to understand, then think about what it means in reverse.

Chapter 6, Selection 2 "Five Classics" means that you can understand and see tangible substances; "Wu neng" means that you can realize the realm of qi and see microorganisms invisible to the naked eye. "Wukong" is to realize what is behind "Qi" and make it out of nothing.

There are two kinds of "evil spirits" in Chapter 6. In the absence of sunshine, if cold and dirty things stay in the body for too long, they will be wet and turbid, which is the "evil" on the surface; Not smoking or drinking, but depressed and living a miserable life, is actually creating "evil spirits."