姚寶炘 Yáo Bǎoxīn, late-Qīng prefacer; contributed a 1901 preface to a later reissue of the Qǐméng zhēndì 啟蒙真諦 combined edition pairing KR3em009 Yīcǎotíng mùkē quánshū 一草亭目科全書 with KR3em013 Yìshòu yǎnkē 異授眼科.