The original name of Zuozhuan was Zuo Qiuming's Zuoshi Chunqiu, and it was renamed Chunqiu Zuozhuan in Han Dynasty. It is a chronological history book with complete narrative in ancient China, and also a representative of prose works in the pre-Qin period, marking the maturity of China's narrative prose.
The Han Dynasty was also called Zuoshi and Zuoshi in the Spring and Autumn Period. It was called Zuo Zhuan only after the Han Dynasty. It is also called "Three Biographies of Spring and Autumn" with Biography of Ram and Biography of Gu Liang. According to legend, it was written by Zuo Qiuming at the end of the Spring and Autumn Period to explain Confucius' Spring and Autumn Annals.
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Zuo Zhuan represents the highest achievement of pre-Qin historiography, is an important document to study pre-Qin history and Spring and Autumn history, and has a great influence on later historiography, especially on establishing the status of chronological history books.
Moreover, because it has a strong Confucian tendency, it emphasizes hierarchical order and patriarchal ethics, attaches importance to the distinction between honor and inferiority, and also shows the idea of "people-oriented", which is also an important historical material for studying Confucianism in the pre-Qin period.
Zuo Zhuan mainly records the decline of the royal family in Zhou Dynasty and the history of the hegemony of princes, and records and comments on various etiquette norms, laws and regulations, social customs, ethnic relations, moral concepts, astronomy and geography, calendar seasons, ancient documents, myths and legends, and ballads.