Dǒng Kǎi 董楷 (b. 1226; death year unrecorded), zì Zhèngshū 正叔, of Tāizhōu Línhǎi 台州臨海 (modern Línhǎi county, Zhèjiāng). CBDB id 49700: birth year 1226 recorded; no death year.
Jìnshì of Bǎoyòu 4 (1256). Career to Lìbù lángzhōng 吏部郎中.
Pedagogical lineage: Dǒng Kǎi’s teacher Chén Qìzhī 陳器之 (a second-generation Zhū-Xī-school transmission figure, hào Běixī 北溪 in Dǒng Kǎi’s report; not the canonical Běixī Chén Chún 陳淳, 1159–1223, who is too early to be Dǒng Kǎi’s teacher). Through Chén Qìzhī, Dǒng Kǎi is in the third-generation ZhūXī transmission line.
Within the Kanripo corpus he is the author of KR1a0061 Zhōuyì zhuànyì fù lù 周易傳義附錄 — a 14-juan combined edition of Chéng Yí’s Yì zhuàn and Zhū Xī’s Zhōuyì běnyì, with appended materials from the two masters’ collected works and Yǔlù. Composed 1266 (Xiánchún bǐngyín).
The work’s bibliographic-historical significance is that Dǒng Kǎi, taking Chéng Yí’s text as primary, broke up Zhū Xī’s gǔyì-recension Běnyì and redistributed it to fit the WángBì recension structural form of Chéng Yí’s Yì zhuàn. This editorial intervention propagated through the YuánMíngQīng standardization of the Běnyì — the orthodox-text circulating in the Yuán-period 1313 canonization, the Míng Zhōuyì dàquán (1415, Hú Guǎng et al.), and Chéng Jǔ’s separate Míng-period cutting — all retain the Dǒng-Kǎi-ified WángBì structural form. The gǔyì form Zhū Xī himself preferred was lost from the standardized examination-system Běnyì until modern critical editions (Zhōnghuá shūjú, Shànghǎi gǔjí) restored it.
The Sìkù tiyao on this work is one of the more bibliographically-attentive Sìkù Yì lèi entries, registering Dǒng Kǎi’s structural intervention as one of the most consequential single editorial decisions in the post-Sòng canonical-commentary tradition.