About the author
Xiao Ji is the author of the Five Elements in Grand Principle (Wuxing Dayi). Public information about him is limited, and his dates of birth and death, nationality, and personal life are unknown. Judging from the surviving work, he focused on the theoretical system of yin-yang and the Five Elements, linking the idea of the Five Elements with traditional knowledge such as astronomy, calendrics, seasonal ordinances, and human affairs. The writing is clearly organized and is essentially expository, devoted to arranging and explaining received knowledge. The Wuxing Dayi circulated widely among works on Five Elements doctrine and has often served later readers as an important reference for understanding the origins and structure of Five Elements thought. It is now read mainly from the perspectives of textual and cultural history, as a way to examine how ancient ideas of the Five Elements were formed and how they influenced later ages. Because direct records of Xiao Ji himself are scarce, our knowledge of him rests chiefly on this work, whose style emphasizes conceptual clarification and the arrangement of materials rather than personal argument. Although the work is classified here under literary appreciation, its content is more accurately described as a systematic discussion of ancient thought and technical knowledge.