Lángāi xiānshēng 蘭陔仁長先生, anonymous late-Qīng physician, fl. 1862–1879+. Author of KR3ep067 Shènwǔtáng zhìyàn lù, a fifteen-juǎn casebook transcribed by his sons (the eldest, 雅樂 Yǎlè, compiled the editorial preface). The studio name Shènwǔtáng 慎五堂 (“Hall of the Five Cautions”) refers to the classical wǔshèn injunction. A 1884 dedicatory verse confirms his biéhào as Lángāi 蘭陔. Surname not securely identified in the transmitted text; tentatively associated with the Qián 錢 family medical lineage of Wújiāng. Not in CBDB.