Dài Zhèn 戴震 (1724–1777; CBDB gives 1723 — Yōngzhèng 1, i.e. 1723/24 by Western calendar; conventionally 1724), zì Shènxiū 慎修, hào Dōngyuán 東原, native of Lóngfù 隆阜, Xiūníng 休寧, Huīzhōu 徽州 (modern Ānhuī). The central figure of mid-Qiánlóng kǎozhèng evidential research and the founder of the Huī 徽 school. Studied under 江永 Jiāng Yǒng (1681–1762) at the Bùzhèngshū 不爭墅 academy in Wùyuán. Spent his middle years in Yángzhōu under the patronage of the Mǎ 馬 brothers, and in Běijīng with 紀昀 Jì Yún. Failed the jìnshì examination six times; finally was specially summoned to the Sìkù quán shū editorial board in 1773 and granted the jìnshì equivalency by imperial favor in 1775, but died on the board in 1777 from overwork. Major works: Mèngzǐ zì yì shū zhèng 孟子字義疏證 (his most important philosophical work; criticizes Sòng lǐxué and accuses it of yǐ lǐ shā rén “killing men with principle”); Yuán shàn 原善; Shēng yùn kǎo 聲韵考; Fāng yán shū zhèng 方言疏證; Kǎo gōng jì tú zhù 考工記圖注; Yī jīng yán 醫經言; Shuǐjīng zhù edition (the contested Sìkù recension); Dài Dōngyuán jí KR4f0053 (12-juan collected works edited by 段玉裁 in 1792). The two-twentieth-century rediscoveries of Dài (Hú Shì 1925; Yü Ying-shih 1976) are foundational to modern Chinese intellectual history. ECCP 695–700 (Hummel/Fang); CBDB id 65933.