Yi Shu intended to clear his mind. This is a kind of annotation that explains both scripture and annotation. Righteousness arose in the Wei, Jin, Southern and Northern Dynasties, and the Tang people "revised the righteousness of their predecessors, and even made it by imperial edict, named Zheng Zheng." (Preface to Huang's Textual Research on Zuo Zhuan's Old Shu) Therefore, Yi Shu was also called Yi Shu in the Tang Dynasty. Shu, Shuo Wen: "Shu, Tong Ye." "Sparse" is relative to "note" and is a further note on the basis of "note". The text is abstruse and can only be understood after interpretation, just like a blocked waterway, which can only be unblocked after perfusion, so it is called "note" to explain the scripture; If it is still unclear, it will be dredged again, so the annotation of the notes in the scriptures is called "sparse". For example, The Book of Rites is Zheng Xuan's note and Kong's note. Zhuangzi is Guo Xiang's annotation, which is extensive and profound. "Righteousness" refers to people who get righteousness by interpreting classics. For example, Confucius's Justice of the Five Classics is to separate the Five Classics. But sometimes "justice" is not necessarily sparse. For example, justice in Zhang Shoujie's Historical Records is "annotation" rather than "sparseness".
Yi Shu style notes are often quoted by others, and listing a large number of materials is its strength. But sometimes it is complicated and dazzling. Before the Song Dynasty, Shuhe Jing Zhu was a separate book. After the Song Dynasty, in order to facilitate reading, Shu was published together with the corresponding classics. Therefore, "Notes on the Style of Artistic Calligraphy" contains several parts, such as the original text, notes, sparse, etc., with regular arrangement and obvious marks.
At present, the most popular annotation of the Thirteen Classics is an annotation that integrates biography, writing and neglect edited by Ruan Yuan in Qing Dynasty. Most of the notes on the Thirteen Classics were made by Han people or Wei and Jin people, while those made by Tang and Song people. The annotators of each book are as follows:
Zhouyi: Wei, Han, Tang Kong and other justice; Shangshu: Old topics such as Han Kong Anguo Biography, Tang Kong Yingda and other justice; The Book of Songs: Biography of Han Maoheng, Selected Notes of Han Zheng, and Justice of Tang Kong Ying Da; "Zhou Li": Han Zheng Xuan notes, Tang Gong Yan sparse; "Yili": Han Zheng Xuan's note, Tang Gong Yan's sparse; Book of Rites: Han Zheng selected notes, Tang Kong Yingda and other justice; Zuo Zhuan in the Spring and Autumn Period: Du Jin's pre-note, Tang Kong Yingda's justice; Biography of the Spring and Autumn Ram: He Xiu in Han Dynasty, Yan Xu in Tang Dynasty; Biography of Gu Liang in the Spring and Autumn Period: Fan Ning in Jin and Yang Shixun in Tang Dynasty; The Analects of Confucius: strict harvest, sparse soldiers; The Book of Filial Piety: the note of Emperor Xuanzong of Tang Dynasty, and the sparseness of Song Xingbing; "Erya": Jin Guo Pu Zhu, Song Xing Bing Shu; Mencius: Notes of Zhao Qi in Han Dynasty and Shu Shu in Song Dynasty.
The above is for reference only, I hope it will help you.