This book is a key to the dark psychological world, and it is a pair of cold eyes for insight into complicated social phenomena.

The theoretical system of the book is relatively complete, and as many practical cases as possible are used to explain and elaborate the corresponding specific applications.

This book can give some enlightenment to those young people who are still confused or bound by inertial thinking, so that they can understand enough life experience and philosophy, face life with a more relaxed and happy attitude and prepare for the glory of life.