Xún Xù 荀勖 (d. 289), zì Gōngzēng 公曾, was a Western-Jìn statesman, bibliographer, musicologist, and imperial librarian. Native of Yǐngyīn 潁陰 in Yǐngchuān 潁川 (modern Hénán), descended from the great HànWèi Xún clan (Xún Yù 荀彧 was his great-grandfather). He served as Mìshū jiān 祕書監 (Imperial Librarian) under Jìn Wǔdì 晉武帝 and chaired the commission that collated the Jízhǒng 汲冢 bamboo-slip cache discovered in Tàikāng 2 (281 CE), including the Mù Tiānzǐ zhuàn (KR3l0092) and the original Zhúshū jìnián. He authored the Jìn Zhōngjīng bù 晉中經簿 — the bibliographic catalogue that established the four-fold jīng / shǐ / zǐ / jí division of Chinese books that the Sìkù quánshū still followed sixteen centuries later. Also a renowned musicologist: reformed the Tàiyuè 太樂 court music pitch-standards by recovering the Hàn-era pitch-pipes. His biography is in Jìnshū 39.