This book is the collection of theses on culture written by Mr. Qian Mum mainly exploring on the issues such as civilization and nature, spirit and material, Li Qi, Yin and Yang, etiquette, etc. After Reviews on Outline of National History by Qian Mu, Mr., Qian Mu goes for culture, in the withering mortal world, he often meditates in leisure time and compiles theses into this book which is composed of 30 short but incisive pieces of articles arranged in order according to the time when they were compiled.