This book is a collection of letters between Zeng Guofan and his relatives and friends. The book describes in detail how a scholar who works hard in officialdom faces the little things in life, how to cultivate self-cultivation, how to be self-disciplined and how to reflect on his mistakes.

2. "Small window"

This is a collection of essays written by Chen Jiru, a scholar in Ming Dynasty, which not only criticizes the declining world, but also reveals the philosopher's thoughts. He realized the truth of life by laughing and cursing, which mainly showed the inner world and spiritual pursuit of literati who were indifferent to fame and fortune, quiet and far-reaching, and extraordinary.

3. Caigen Tan

This book is a collection of quotations on self-cultivation, social life, socialization and fertility compiled by Taoist Hong Yingming in the early Ming Dynasty. It was a rare and precious training for the past. It has an incredible subtle influence on people's cultivation and moral cultivation.

4. Tao Te Ching?

The philosophical works of Laozi (Li Er) in the Spring and Autumn Period are an important source of Taoist philosophy. The text takes "virtue" in the philosophical sense as the key link, and discusses the ways of self-cultivation, governing the country, using troops and keeping in good health, mostly focusing on politics. It is the so-called "inner sage and outer king", which has profound meaning and wide tolerance and is known as the king of all classics.

5. The Analects of Confucius

As one of the classic works of Confucianism, a collection of recorded essays, mainly memorizing words, mainly records the words and deeds of Confucius and his disciples in the form of quotations and dialogues, which embodies Confucius' political, aesthetic, moral and utilitarian views.