the "zutang ji" (祖堂集 "anthology of the patriarchal hall"), compiled in 952, the first document which mentions linji yixuan, was written to support the xuefeng yicun lineage. it pictures this lineage as heir to the legacy of mazu and the hongzhou-school, though xuefeng yicun's lineage is traced back to shitou xiqian (700-790). it was written by two students of zhaoqing wendeng (884-972), a dharma descendant of xuefeng yicun.