The Sūtra of Perfect Enlightenment （Dafangguang yuanjue xiuduoluo liaoyi jing 大方広円覚修多羅了義経, T. 842, SPE） is an important Buddhist apocryphon that was particularly valued by Zongmi. Zongmi not only inherited the doctrine from the Huayan school 華厳宗, but also from the Heze school of Chan Buddhism. In Zongmi’s commentary, the names of Weique 惟慤, Wushi 悟実, Daoquan 道詮, and Jianzhi 堅志 appear as commentators on the SPE, preceding Zongmi. Of these, several people close to Weique can be identified as associated with Shenhui 神会. Therefore, it is highly possible that there was some relationship between Weique and the Heze school. Wushi and Jianzhi were inheritors of the Heze school and were active in Liangjing 両京. Considering the fact that the Heze school recommends the studies of sūtras, and that the SPE contains theories similar to those of the Heze school, it is highly possible that the commentarial tradition of the SPE was related to the teachings of the Heze school.
