The Han and Jin dynasties were significant periods in which the study of Zuo Zhuan(Zuo's Commentary on the Annals of Spring and Autumn)左传 underwent the changes from its inception to maturity.At the end of the Western Han dynasty,graphic prophecy and mystical divination flourished along with the ancient scriptures.At the beginning of the Eastern Han Dynasty,graphic prophecy became the officially advocated doctrine.Zheng Zhong郑众 introduced the art of divination into Zuo Zhuan,which was rarely practiced by scholars.The use of graphic prophecy to expound the Commentary texts by Jia Kui贾逵 was appreciated by the ruler and became a major turning point in the development of Zuo Zhuan studies.At the end of the Han dynasty,the contemporary scriptures and graphic prophecies both slid into decline,and erudition became the pursuit of scholars.The use of the Shan Hai Jing(Classic of Mountains and Seas)山海经 and the Shen Yi Jing(Book of Gods and Strange Things)神异经 by Fu Qian服虔 to expound the Commentary texts shows his unique interest in erudition.The use of dialects and colloquialisms,on the other hand,was in tune with the purport of the scholars.The excessive introduction of new knowledge is one of the reasons for the cumbersome nature of Fu Qian's commentary.In the context of the development of Han and Wei historiography,Du Yu杜预 regarded the Annals of Spring and Autumn春秋 and Zuo Zhuan as narrative histories.In the context of the development of Han and Wei historiography,Du Yu,with his profound knowledge of calendars and geography,constructed a new spatio-temporal knowledge framework of the Annals of Spring and Autumn and Zuo Zhuan,laying the foundation for the study of Zuo Zhuan in later generations.