Liú Yīrén 劉一仁, otherwise undocumented physician of the MíngQīng transition (mid-17th c.). Conventionally named as author of KR3eq079 Yīxué chuánxīn lù 醫學傳心錄, transmitted as a chuánxīn (heart-transmitted) lineage didactic-mnemonic compendium by 錢樂天 Qián Lètiān. Not in CBDB. The attribution is reported in late-Imperial bibliographies but cannot be independently verified.