"This preface is one of a series contributed to Xuanzang 's translation of the sutra by Xuanze of Ximing Monastery. The corresponding text may be found in T220:
T220, vol.7.921a4-19. Additional prefaces to the sutra contributed by Xuanze are recorded in P.2481:
V/5, P.2484, and P.2484:
R.2."
(JB)