"This describes the duties for each of the twelve two-hour periods of each day, starting at midnight-2am. Contrary to the title, the text bears no particular relation to Chan teachings and appears to have been devised as a code of conduct for the laity. Transcribed in Pachow_1965:
55-7; transcribed and discussed in JiaoDemieville_1971:
72, 304-5 and 323. A critical edition of the twelve verses in DGZ:
DGZ 3.1347-61 is based on a collation of this ms. with a fragment in BJ:
BJ 'niao' 10 and Jao 's transcription. A variant text with the same title, also continuing from recto to verso, is found in P.3116:
R.3-V.1. Other versions are in Or.8210/S.2679, P.2690:
V and P.3604."
(JB)