丘处机
During the Song Dynasty, the "Huangdi Yinfujing" was canonized by the Quanzhen "Complete Perfection" school of Neidan internal alchemy. Liu Chuxuan 劉處玄 (1147–1203), founder of the Suishan (隨山 "Mount Sui") lineage, wrote a commentary, and Qiu Chuji 丘處機 (1148–1227), founder of the Longmen (龍門 "Dragon Gate") lineage, wrote another. Xia Yuanding 夏元鼎 (fl. 1201) wrote a textual exegesis. The analytical commentary ("Yinfujing Kaoyi" 陰符經考異) dubiously attributed to the leading Neo-Confucian scholar Zhu Xi first suggested that Li forged the text.