"The Complete Collection of Doctrinal Doctrine: The Unique Art of Self-cultivation for Practical Use in the World" is actually a unique art of self-cultivation that can be applied in the world. "The Great Learning" was originally the 42nd chapter of "Book of Rites". In the Song Dynasty, brothers Cheng Hao and Cheng Yi extracted it from the "Book of Rites" and compiled it into chapters. Zhu Xi compiled the "Great Learning", "The Doctrine of the Mean", "The Analects of Confucius" and "Mencius" into annotations and called them the "Four Books". From then on, "The Great Learning" became a Confucian classic. Zhu Xi reorganized "The Great Learning" into one chapter of "Classics" and ten chapters of "Biography". It is believed that "one chapter of the Classic contains Confucius' words, and Zengzi recounted them; ten chapters of the biography contain Zengzi's meaning, and his disciples recorded them." That is to say, "Jing" is Confucius's words, and Zengzi recorded them; "Zhuan" refers to Zengzi's interpretation of "Jing", which was recorded by Zengzi's students.
