Secondly, we should learn books related to it, that is, representative works of Confucianism and Taoism, such as Daxue, The Doctrine of the Mean, Notes on Four Books and Sentences, and Recent Thoughts. From this, we can draw the development vein of the two schools.
Thirdly, after that, we should learn some famous annotation books, such as General Explanation of Confucian Family Words, Interpretation of Analects of Confucius, Annotation of Mencius, Interpretation of Tao Te Ching, Annotation of Zhuangzi, etc. To understand the interpretation of these classics.