Zhèng Gǔ 鄭谷 (ca. 851–910, zì Shǒuyú 守愚), of Yíchūn 宜春 (modern Jiāngxī). Jìnshì of Guāngqǐ 3 (887); rose under Qiánníng (894–98) to Dūguān lángzhōng (Director, Bureau of Receptions) — hence the nickname Zhèng dūguān. His most famous poem, the Zhègū 鷓鴣 (Partridge), gave him the additional sobriquet Zhèng zhègū.
Zhèng’s father had served as Yǒngzhōu cìshǐ and was a colleague of Sīkōng Tú 司空圖; Sīkōng on first meeting young Zhèng prophesied he would be “master of one generation’s wind-and-saō.” Despite this prediction (and Zhèng’s contemporary fame), the Sìkù tíyào finds his verse formally weak (gédiào bēixià).
Principal work in the corpus: Yúntái biān KR4c0094 in 3 juǎn (~300 poems) — compiled in Qiánníng 1 (894) at the Yúntái dàoshè (Cloud-Terrace Daoist Lodge) at Huázhōu during the Zhāozōng refugee court at Sānfēng. His other known collection, the Yíyáng jí (3 juǎn, recorded in Xīn Tángshū yìwénzhì), is lost. CBDB id 93832 gives 851– (no death year recorded).