There were different records about the author of Tuiqiu Shiyi (Ascertaining My Teacher's Ideas) in the bibliographic books in past dynasties.Some of them referred to WANG Ji,and others to DAI Yuanli.Today's publications and bibliographic books all refer to DAI Yuanli.But the preface of Tuiqiu Shiyi indicated that DAI Yuanli referred to the author was a guess at that time.General Catalogue of Complete Library of Four Branches of Literature · Ascertaining My Teacher's thought that this book was one of Zhengzhi Yaojue (Important Tips to Analysis and Treatment of Patterns),Zhengzhi Leifang (Analogous Formulas for Analysis and Treatment of Patterns) and Leizheng Yongyao (Usage of Medicinal for Treating Analysis Patterns) written by DAI Yuanli.But the comparison among them shows that there are a few similarities between Tuiqiu Shiyi and Michuan Zhengzhi Yaojue Ji Leifang (Esoteric Important Tips and Analogous Formulas for Analysis and Treatment of Patterns).Also it is not unlikely that Tuiqiu Shiyi is a book in WANG Ji's name.The author of Tuiqiu Shiyi requires further investigation.