Mò Zhīzhī 莫知之 (hào Yúnyán 雲岩, fl. mid-Tóng-zhì era, ca. 1870s), Qīng literatus, preface-writer for the Yīfāng shíjǐn 醫方拾錦 (KR3ed132) of 田綿淮 (Tián Miánhuái), dated Tóngzhì guǐyǒu winter-solstice = 1873. The preface displays unusual literary sophistication in unpacking the title’s shíjǐn (picked-brocades) trope and in positioning the work alongside Chén Jiǎmó’s Běncǎo méngquán shíyí and Féng Zhàozhāng’s Féngshì jǐnnáng mìlù. The hào Yúnyán identifies him with the Yúnyán studio-circle but no further biographical record is securely identifiable.