Nìjiàng yì 逆降義
Inverse-Downgrading Doctrine
by 蔡謨 (撰)
About the work
A single-juàn, single-fragment reconstruction of 蔡謨 Cài Mó’s (281–356) lost Nìjiàng yì 逆降義. Cài Mó, zì Dàoming 道明, was an Eastern-Jìn court minister rising to Sī-tú 司徒 under Jìn Mùdì, and a major court ritualist alongside 賀循 and 孔衍. His ritual scholarship is preserved in two reconstructed works in this corpus: the present Nìjiàng yì, and KR1d0120 Cài-shì sāng-fú pǔ.
Abstract
The single surviving fragment of Nìjiàng yì preserves Cài Mó’s principal doctrinal innovation: a nomenclature-and-mourning rule on the nì-jiàng 逆降 (“inverse downgrading”) of collateral mourning between in-laws (bó-shū, cóng-mǔ, shēng-zhí) — i.e. the technical question of when “nephew” (shēng 甥 or zhí 姪) should be applied and whether the term can be extended to relatives by marriage. The doctrine is set out as a question-answer dialogue:
- Question: can shēng-zhí (nephew-style terms) be applied to one’s bó-shū and cóng-mǔ (mother’s-side uncles and aunts)?
- Answer: No. Bó-shū have a paternal-name designation, so the xiōngdì-zhī-zǐ (one’s brothers’ children) cannot be called cóng-mǔ-zhī-shēng (their mother’s-side-nephews). Bó-shū have a maternal-name, so zǐ-mèi-zhī-zǐ (one’s sisters’ children) cannot be called shēng. Shēng-zhí applies only to gū and jiù (paternal-aunt and maternal-uncle): zhí means “actually-of-this-line” (shí 實), shēng means “born-from” (shēng 生); women remain emotionally bound to their natal line, hence “zhí” of the brother’s son; men reside-within (the patriarchal house), hence “shēng” of the sister’s son who lives outside. Bó-shū are internal — cannot be called zhí. Cóng-mǔ (both maternal aunts and uncles) are external — cannot be called shēng.
This terminological precision is doctrinally important for the parallel Sāngfú mourning rules: an inappropriate kinship-term implies an inappropriate mourning-grade. The Nìjiàng yì sets the nomenclatural rules that govern downward-application of mourning-grade reductions in cross-generational collateral cases.
The dating bracket (281–356) reflects Cài Mó’s documented lifespan in Jìn shū 77.
Translations and research
No substantial secondary literature located. Treated in surveys of Eastern-Jìn ritual scholarship.
Other points of interest
The Nìjiàng yì is the principal extant statement of an Eastern-Jìn technical doctrine on kinship-terminology that does not survive in continuous form in any other source. Its principle that shēng-zhí terms apply only to gū / jiù (paternal-aunt and maternal-uncle) is a notable Six-Dynasties moderation of the canonical Yí-lǐ / Lǐjì terminology that became the basis for medieval Chinese kinship-vocabulary standardisation.
Links
- Chinese Text Project — Tōngdiǎn: https://ctext.org/tongdian