ancient commentary on the Chunqiu (“Spring and Autumn 【Annals】”) and the first sustained narrative work in Chinese literature.

The Chunqiu, the first Chinese chronological history, records the principal political, social, and military events of the Spring and Autumn period (770–476 BC) of China's history. The Zuozhuan is a detailed commentary on this work and provides extensive narrative accounts and ample background materials. It also provides authentic historical documents and written evidence (though fragmentary) of the philosophical schools of the time. The commentary occupies a seminal place in the history of Chinese literature because of its influential narrative style. Historical events and personages are presented directly through action and speech, and the book's third-person narrative is notable for its orderly structure and clear and laconic presentation.

The Zuozhuan was once believed to have been written by Zuo Qiuming, an ancient historian of Lu. It is now believed to have been compiled by an anonymous author during the early part of the Warring States period (475–221 BC). The Zuozhuan is listed among the Nine, Twelve, and Thirteen Classics of Confucianism.