Chéng Lóng 程龍, Sòng-period commentator on the Yì wěi 易緯 tradition. Cited in the Sìkù notice on KR1a0163 for the observation that after the Suí persecution of chènwěi 讖緯 only the Qián záo dù and Kūn záo dù texts (of the Yì wěi corpus) circulated in his day.