As far as knowledge is concerned, it can be indirect knowledge that you come into contact with through various channels, or it can be the accumulation of your own personal experience, but the most important thing is a lot of professional knowledge of behavioral psychology. As far as cultivating insight is concerned, 1, define the object of observation. 2. Cultivate strong interest and curiosity. 3. Master good observation methods.

Mind-reading-is a technique to hold people's hands and detect the hidden location of their objects according to the reactions caused by people's unconscious activities.