Dù Guāngtíng 杜光庭 (zì Bīnshèng 賓聖; hào Guǎngchéng xiānshēng 廣成先生), native of Chǔzhōu 處州 (modern Zhèjiāng), was the most prolific and institutionally central Daoist author of the late Táng and Former-Shǔ 前蜀 period. Originally a jìnshì candidate who failed the examinations, he entered Tiāntái shān 天台山 as a disciple of the Shàngqīng master Yīng Yíjié 應夷節 in his twenties. He rose to prominence at the Táng court under Xīzōng 僖宗, serving as ritual officiant and yǐnjià 引駕 preceptor; when Xīzōng fled Cháng’ān to Chéngdū during the Huáng Cháo 黃巢 rebellion (880), Dù accompanied him and subsequently remained in Shǔ under the Former-Shǔ founder Wáng Jiàn 王建 and his son Wáng Yǎn 王衍. Wáng Yǎn granted him the title Chuánzhēn tiānshī 傳真天師 and the honorific Guǎngchéng xiānshēng 廣成先生 at a reciprocal-investiture ceremony of 923.
Dù’s œuvre reshapes virtually every genre of medieval Daoist writing: doctrinal commentary (Dàodé zhēnjīng guǎngshèngyì 道德真經廣聖義), hagiography (Lìdài chóngdào jì 歷代崇道記, Yōngchéng jí xiānlù 墉城集仙錄), Daoist topography (Dòngtiān fúdì yuèdú míngshān jì 洞天福地嶽瀆名山記), ritual (Tàishàng huánglù zhāiyí 太上黃籙齋儀 and numerous other liturgies), miracle-tale compilation (Dàojiào língyànjì 道教靈驗記), and editorial recensions of earlier scriptures — including the definitive twenty-juàn recension of the Dòngyuān shénzhòu jīng KR5b0019 to which he supplied the preface narrating its purported revelation to Wáng Zuǎn on Mǎjī shān. The standard monograph is Franciscus Verellen, Du Guangting (850–933): Taoïste de cour à la fin de la Chine médiévale (Paris, 1989).