Cheng Jing was an important pioneer in the field of Marxist historiography in China.However,scholars today have not fully recognized his contributions.Influenced by the trends of Marxist thought,Cheng adhered to"the faith in the materialistic view of history"in the early 1920s,and thereafter applied this doctrine in specific historical research.From 1928 to 1933,he successively proposed a series of views on social forms,such as the primitive society evolving from clans to tribes,the tribal nature of the Yin and Shang,the feudal society of the Western Zhou,and the variation of the feudal society in the Eastern Zhou and the period after the Qin Dynasty.He was among the early scholars who applied Marxism in the study of Chinese social history.In addition,he published a series of articles on the history of Chinese philosophy,not only exploring the history of pre-Qin philosophy from the perspective of the relationship between thought and doctrines and the historical eras,but also examining the history of modern Chinese philosophy from the perspective of the origin and evolution of thought.In the history of Marxist historiography in China,Cheng Jing's unique significance lies in the fact that he broke through the limitations of Chinese positivist historiography from within the camp and advanced the academic path of Chinese Marxist historiography.