Zhū Yù 朱彧 (zì Wúhuò 無惑; fl. c. 1100–1120), Northern-Sòng shìdàfū and bǐjì author. Native of Wūchéng 烏程 (modern Húzhōu, Zhèjiāng). Son of 朱服 Zhū Fú, the Yuánfēng-era official, Liáo-envoy, and Prefect of Guǎngzhōu under Yuánfú–Chóngníng. Zhū Yù held no senior office of record and is not given a lièzhuàn in the Sòng shǐ; his birth and death years are uncertain (CBDB id 16702 carries no dates). He is known almost exclusively for his sole surviving work, KR3l0059 Píngzhōu kětán 萍洲可談, composed c. 1110–1118 from materials his father had related to him about Guǎngzhōu, court politics, and the Yuánfēng — Yuánfú administrative world. The work is one of the most important Northern-Sòng primary sources for the shìbósī (Maritime Trade Commission), the fānfāng foreign-merchant quarter of Guǎngzhōu, Arab (Dàshí) and Southeast-Asian shipping, and the early use of the magnetic compass on Chinese ocean-going vessels. The work’s political stance — favoring his father’s faction (Shū Dǎn 舒亶, Lǚ Huìqīng 呂惠卿) against the Yuányòu party of the two Sū — is flagged by the Sìkù editors as filial-piety bias.