People in the transitional period of society have frequent and huge, sharp and subtle changes in their minds. It is intended to advocate mental gymnastics to keep their minds healthy and pure.Liu Xinwu said that these essays were first written for himself, "Frankly speaking, like everyone else, I also have a large gray area in my heart. For example, before I was 50 years old, I was jealous of my peers and afraid of them. surpassed myself; after the age of 60, I was envious of the talents of the younger generation of writers, and feared that they would overshadow our generation of writers. Fortunately, I have done "exercises" in time these years, so that I dispelled the shadow that was smoldering in my heart, and my mentality became healthy Brighten up."...