Duàn Chāngwǔ 段昌武
Zì Zǐwǔ 子武. Native of Lúlíng 廬陵 (modern Jí’ān 吉安, Jiāngxī). Studio Cóngguìtáng 叢桂堂 (“Hall of the Clustered Osmanthus”). Wikidata Q45400515, CBDB id 21766.
Biographical detail is essentially unrecoverable; the Sìkù editors note flatly “其始末無考” (“his life-circumstances are unresearchable”). All that is certain comes from the 1248 petition by his nephew 段維清, which refers to him as “the late uncle, Court Gentleman for Audience (Cháofèng láng 朝奉郎), Chāngwǔ, who twice topped the autumn tribute on the Shījīng and in repeated examinations passed the spring office.” He had therefore died before 1248; a floruit of ca. 1200–1240 — i.e. late Níngzōng 寧宗 through Lǐzōng 理宗 — is the safest formulation, with his jìnshì sometime in the early to middle thirteenth century.
Surviving work: Duànshì máoshī jíjiě 段氏毛詩集解 (KR1c0022, surviving in 25 of an original 30 juan in the WYG; originally titled Cóngguì máoshī jíjiě 叢桂毛詩集解 after his studio). A separately-attested Shīyì zhǐnán 詩義指南 survives only by title; the present work follows Lǚ Zǔqiān’s 呂祖謙 Dúshī jì 讀詩記 in method but in plainer language.
Two persistent catalogue errors attach to his name: Jiāo Hóng’s 焦竑 Jīngjí zhì 經籍志 misprints him as Duàn Wénchāng 段文昌 (confused with the Táng figure of that name); Zhū Mùwēng’s 朱睦㮮 Shòujīng tú 授經圖 inverts the name as Duàn Wǔchāng 段武昌.