Lǚ Wēn 呂溫 (772–811), zì Héshū 和叔 (also Huàguāng 化光), was a Hézhōng Hédōng 河中河東 native, son of the jìnshì Lǚ Wèi 呂渭. Jìnshì of Zhēnyuán 14 (798) and bóxué hóngcí of Zhēnyuán 15 (799). He studied the Chūnqiū under Lù Chún 陸淳 (the principal disciple of the TānZhāo 啖趙 school) and prose under Liáng Sù 梁肅. Lǚ rose to xíngbù lángzhōng and shì yùshǐ. He was associated with the Wáng Shūwén / Liú Yǔxī / Liǔ Zōngyuán reform faction; in 805, when the faction was purged, Lǚ was on a diplomatic mission to Tibet (Tǔbō 吐蕃), which insulated him from the Bā sīmǎ fate. On his return he was nonetheless eventually exiled (806) — first as cìshǐ of Dàozhōu 道州, then transferred to Héngzhōu 衡州, where he died in office in 811. Hence the title Lǚ Héngzhōu.
Principal work in the corpus: Lǚ Héngzhōu jí KR4c0052 in 10 juǎn, originally edited by Liú Yǔxī 劉禹錫 and reorganized in transmission. His gǔwén prose is theoretically self-conscious — the Sòng Xuē Tiānxìn guī Línjìn xù and the Péishì hǎihūn jí xù are early Yuánhé-period programmatic essays — and his Chūnqiū learning channeled Lù Chún’s anti-Zuǒzhuàn doctrine into literary form (the Gǔ Dōngzhōu chéng míng). Catalog meta gives 774–813; CBDB (id 92516) and standard reference works give 772–811, followed here.