Early-Míng Daoist patriarch, the forty-third-generation Celestial Master (sìshísān dài Tiānshī 四十三代天師) of the Lónghǔshān 龍虎山 Zhèngyī 正一 lineage, native of Guìxī 貴溪 (Jiāngxī 江西). Styled Qíshān 耆山 and Wúwéizǐ 無為子. He succeeded to the patriarchate c. 1377 (on the death of his father Zhāng Zhèngcháng 張正常) and held office under the Hóngwǔ 洪武 and Yǒnglè 永樂 emperors until his death in 1410 (CBDB c_personid 34443). Zhāng Yǔchū was the most learned Celestial Master of the early Míng, celebrated for his Confucian classical training, literary output (extant as Xiànquán jí 峴泉集 in eight juan), and editorial interest in the Daoist textual tradition; under his patronage many Sòng and Yuán Daoist texts were reprinted for circulation. His signed colophon on Shàngqīng dàdòng zhēnjīng 上清大洞真經 (DZ 6) records the later Fujian re-printing of Jiǎng Zōngyīng’s edition by the daoshi Xióng Chángyī 熊昌益, the immediate ancestor of the Zhèngtǒng Dàozàng text. Zhāng Yǔchū is also the compiler of the early-Míng Daoist codes (Dàomén shígūi 道門十規 of c. 1400, preserved in DZ 1232) and is a central figure in the state-sponsored Daoist institutional consolidation that led directly to the compilation of the Zhèngtǒng Dàozàng itself (1445). For a monographic study see Pierre-Henry de Bruyn, Le Wudang shan: Histoire des récits fondateurs (EFEO, 2010), and the notice in Schipper & Verellen eds., The Taoist Canon (2004), 2:—.