Based on his personal experience of recovering from depression for many years, the author has researched and summarized a psychological theory system – Autumn Water Theory. Using online platforms, the author shares his own experience and helps countless people with the same suffering to get rid of their troubles, regain confidence, and embark on the road to recovery. This book is compiled based on a large number of consultation cases and rehabilitation practices. It systematically elaborates the psychological mechanism of depression, subverts the public’s perception of depression, reveals the truth behind the long-lasting depression, and analyzes many puzzling doubts. Throughout the book, the author’s thoughts and views are unique, with rigorous logic, profound content, and in-depth yet easy-to-understand discussions. The case analysis is vivid and suitable for patients with depression, depression researchers, teachers from primary to university, personnel from government agencies and enterprises, as well as psychology enthusiasts and other relevant personnel.