Tu Mu’s conjecture seems to be based on a passage in the 漢官解詁 “ Wei Wu Ti strung together Sun Wu’s Art of War ,” 43 which in turn may have resulted from a misunderstanding of the final words of Tsʽao Kung’s preface: 故撰為略解焉 . This, as Sun Hsing-yen points out, 44 is only a modest way of saying that he made an explanatory paraphrase, 45