Tianhuang Daowu

Tianhuang Daowu (天皇道悟, 748–807) is recorded in the *Jǐngdé Chuándēng Lù* as a Dharma heir of Shitou Xiqian who taught at Tianhuang Temple in Jingzhou (modern Hubei)^[1]. The Song-era lamp records describe a student whose realisation matured slowly under Shitou and who, in contrast to the shock-tactics of his Mazu-line contemporaries, was remembered for a gentler, more reticent style of instruction^[2].

Tianhuang's place in Chan history rests on a single decisive link: his transmission to Longtan Chongxin, the teacher of Deshan Xuanjian. Through Deshan and his student Xuefeng Yicun, the Tianhuang line gave rise to the Yunmen and Fayan houses, two of the canonical Five Houses of late-Tang and early-Song Chan^[3]. Modern scholarship is aware of the so-called "two Daowus" problem — a Song-period polemic over whether the line through Longtan in fact descends from Tianhuang Daowu or from a separate Tianwang Daowu (天王道悟) — but the standard genealogy, codified in the *Wǔdēng Huìyuán*, continues to treat Tianhuang Daowu as the recognised patriarch^[4].