  The Laozi zhigui (abbreviated hereafter as Zhigui), as it now stands, is incomplete; only the commentary to the Dejing, chapters 38–81 of the current Laozi, remains. The best edition of the Zhigui is that contained in the Daozang (Daoist Canon, no. 693 in the Daozang zimu yinde, Harvard-Yenching Sinological Index Series, no. 25), which clearly indicates that the work had originally thirteen juan or books, the first six of which have been lost. Judging from the available evidence, it can be accepted as a Han product (A. Chan 1998a). The Laozi text that accompanies Yan Zun’s commentary agrees in many instances with the wording of the Mawangdui manuscripts.