Among Dunhuang Academy’s collection of Dunhuang documents,D. 0135 has only fine lines preserved,totaling 62 words,which are not recorded in the Tripitaka,but can be identified as a manuscript of the Three-Stage School. D.0135 does not correspond,however,to the extant texts of the Three-Stage School. An investigation of the extant Three-Stage School documents suggests that D.0135 might be a part of a Brief Commentary on Three-Stage Visualization Methods.
