Referring now to the catalogue of the Imperial Library of the dynasty of Sui ( AD 502⁠–⁠556), we find that it containd many editions of Lao’s treatise with commentaries. The first mentioned is The Tao Te Ching , with the commentary of the old man of the ho -side, in the time of the emperor Wên of Han ( BC 179⁠–⁠142). It is added in a note that the dynasty of Liang ( AD 502⁠–⁠556) had possessed the edition of “the old man of the