The last three chapters (28-30) of T606, Demiéville thinks, look like a later addition, and probably originally were a separate text. The preface and colophon say that the text is in 27 chapters, 6 juan, but the present text is 30 chapters, 7 juan. Dao'an speaks of a separate text "recently joined" to T606 [original note in CSZJJ: 三品修行經一卷(安公云近人合大修行經), T2145:55.9a10]. These three chapters Demiéville characterises as a "Mahāyāna complement" to the other parts of this YBh. This text discusses three classes of disciples, i.e. adherents of the three vehicles. Demiéville discusses this text/portion of the text and its relation to a range of other sources pp. 351-363. He suggests that the text has clear debts to certain similes in Dharmarakṣa's Saddharmapuṇḍarīka-sūtra T263. (The particular story in question in T263 is not found in any other versions of the Saddharmapuṇḍarīka, and tells of merchants going to the palace of a nāgarāja to obtain a cintāmaṇi; the closest relative to the story is found in Dharmarakṣa's version of the jātakas 生經 T154; even the frame is similar in the two loci.)