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Zuo zhuan. A chronicle of the history of China in the Spring and Autumn Period. Facts show that Chunqiu is one of the important Confucian classics. It was called Zuo's Spring and Autumn Annals in the Western Han Dynasty. After the Eastern Han Dynasty, it was renamed Chunqiu Zuozhuan. According to the textual research of Sima Qian, a historian of the Western Han Dynasty, the author is Zuo Qiuming of Lu. However, Zuo Qiuming was born in the late Spring and Autumn Period, but Zuo Zhuan mentioned some historical facts in the early Warring States Period, so many scholars think this statement is not credible. Kang Youwei asserted in the late Qing Dynasty that it was forged by Liu Xin in the late Western Han Dynasty. However, Zuo Zhuan has been copied or quoted by many people before Liu Xin, and Kang's theory is difficult to establish. Most contemporary scholars believe that it was written by people in the early Warring States period. According to Yang Bojun's research, the book was written between 403 BC and 386 BC.

Zuo Zhuan is an important book to record the social situation in the Spring and Autumn Period. Many valuable philosophical and ideological materials have been preserved, which reflects the further disintegration of the religious concept of heaven, which has begun to shake at the end of the Western Zhou Dynasty, and records the development of materialism, atheism and naive dialectics. For example, Shi Shuxing of the Zhou Dynasty thought that "meteorites" and other phenomena were "yin and yang things", not ghosts and gods predicting good or bad luck; Good or bad luck depends on people. Qin Guohe believes that diseases are not caused by ghosts and gods, but the result of the joint action of Yin and Yang, wind, rain, Yin and Ming. Lu Zishen and Sun Dashu believe that solar eclipse, flood and drought are the results of the interaction of Yin and Yang. The stone mill in the state of Jin thinks that "there are five elements in the earth". Zi Han in the Song Dynasty believed that "five talents are born" and regarded the nature formed by the five elements as the material basis of human existence. Zheng Guo Zichan thinks that "the sky is far away and people are near", so it is not enough to sacrifice treasures to the gods to put out the fire. When discussing the difference between "harmony" and "sameness", Yan Ying, a native of Qi, expressed the simple dialectical thought that different and opposite things can "complement each other" and "complement each other". Shi Mo of Jin also put forward the changing viewpoint of "the country is impermanent, and the monarch and ministers are impermanent".

The main annotations of Zuo Zhuan are: Justice of Zuo Zhuan in the Spring and Autumn Period, Pre-annotation of Jin and Du Dynasties, Justice of Tang and Kong, Annotations on Thirteen Classics Carved by Ruan Yuan in the Twenty-first Year of Jiaqing (1816); Zuo Zhuan Chun Qiu Zhuan, written by Hong in Qing Dynasty, was printed in the 12th year of Jiaqing in Qing Dynasty (1807); Notes on Zuo's Old Certificates in the Spring and Autumn Period, written in Qing Dynasty, published by Science Press 1959; Notes on Zuo Zhuan in the Spring and Autumn Period, by Yang Bojun, Zhonghua Book Company, 198 1 edition.