Liú Sù 劉肅 (fl. early ninth century). Minor Táng official-littérateur; the only firm biographical data come from his own preface to the KR3l0004 Táng xīnyǔ 唐新語, dated to the eleventh month (yuánqiū 圓丘 sacrificial month) of Yuánhé 丁亥, that is 807, with the official self-designation “dēngshì láng, acting district recorder (zhǔbù 主簿) of Xúnyáng district in Jiāngzhōu” (登仕郎守江州潯陽縣主簿). The Xīn Táng shū Yìwén zhì records him as district recorder of Jiāngdū rather than Xúnyáng — the Sìkù compilers note the discrepancy without resolving it. CBDB id 92647 records the entry without firm lifedates (c_fl_latest_year 807 from the preface). His one surviving work is the Táng xīnyǔ in 13 juàn (also called Dà Táng xīnyǔ), an anecdotal history of the Táng arranged into thirty categorical chapters in the manner of Xún Shuǎng’s lost Hànyǔ.
Liú Sù 劉肅 (1122–1183). A separate Jīn-dynasty figure of the same name, CBDB id 13241 — listed for disambiguation only; not relevant to the Táng xīnyǔ author.