Xú Dù 徐度 (fl. 1135–1138; CBDB id 3382), zì Dūnlì 敦立, was a Northern–Southern-Sòng transition official from Gǔshú 穀熟 (modern Hénán). He was the son of Xú Chǔrén 徐處仁 — a Jīngkāng-era prime minister — and writes “xiān gōng” in the Què sǎo biān of his father. After the Southern migration he rose to Lìbù shìláng (Vice-Minister of Personnel). His one surviving work is the Què sǎo biān 却掃編 (KR3j0108) in 3 juàn, a bǐjì compilation of court ceremonies, guānzhì, and standard literati anecdotes, composed (per Lù Yóu’s colophon to it in the Wèinán jí) in his younger years and thus before Shàoxīng; the Sìkù editors note it has substantively no post-Shàoxīng material. The book is one of the major Southern Sòng institutional bǐjì, regularly grouped with 葉夢得’s Shílín yàn yǔ (KR3j0105) and Sòng Mǐnqiú’s Chūnmíng tuìcháo lù as a trio. Wáng Míngqīng’s Huī zhǔ hòu lù further records Xú’s interest in史學 (historical scholarship) — in particular his consultation on the institutional design of the Shūmì yuàn / Zhèngshì táng relationship and his critique of Qín Guì’s deletion of post-Jiànyánhánghǎi day-records.