Lù Yún 陸雲 (262–303), zì Shì lóng 士龍, native of Wújùn Huátíng 吳郡華亭 (modern Sōngjiāng, Shànghǎi), was the younger brother of 陸機 (Lù Jī) and one of the Èr Lù 二陸 (“two Lù”) of the Western Jìn. After the conquest of Wú in 280 he and his elder brother retired together to Huátíng, then traveled north to Luòyáng around 289, where they were welcomed by Tàicháng Zhāng Huà 張華 with the famous remark “the conquest of Wú yielded two paragons” 伐吳之役利獲二俊. Lù Yún rose to Qīnghé nèishǐ 清河內史 — the title under which the SBCK edition of his collection identifies him. He was caught in the Bā wáng zhī luàn and executed in 303 by Sīmǎ Yǐng 司馬穎 alongside his brother on the false denunciation of Lú Zhì 盧志. Standard biography in Jìn shū 54. The Jìn shū says his prose was rated below his brother’s but his argumentation above it; the Sìkù tíyào compilers concur. His writings survive in KR4b0007 Lù Shìlóng wén jí 陸士龍文集 — re-edited and printed by Xú Mínzhān 徐民瞻 in 1200 as the second half of the Jìn èr jùn wén jí. The Yǔ xiōng Píngyuán shū 與兄平原書 letters in this collection are the principal contemporary witness to Lù Jī’s compositional process.