(1). Explore the truth of the subtle mystery. "Book of Changes": "It is nothing more than a turtle exploring the hidden meaning, hooking deep and reaching far, and determining the quality of the world." Kong Ying Da's book: "Ask for it, and hide it." Hu's poem "You Guan" says: "Mourning for politics and seeking seclusion." Song Fan Zhongyan's "Dry as a Golden Fu": "It is difficult to get an image if you want to live in seclusion." Xie Ming Zhao Zhe's "Five Miscellaneous People's Department IV": "Those above are curious about their work and content with their seclusion."
(2) Textual research on ancient book annotations. Preface of Tang Sima Zhen: "It is also a compliment to explore different stories and adopt allusions to explain my unsolved, unsolved and unsolved problems. Every thirty volumes are called Historical Records. " Guo Moruo's Collection of Literature and Art, the problems in modern translation of ancient books: "It is necessary to sort out China's ancient books, such as textual research, systematic research, adding new punctuation, so that a number of books can be hidden."