Ráo Dòngtiān 饒洞天 (fl. 994, Northern Sòng) is the legendary first transmitter of the Tiānxīn zhèngfǎ 天心正法 (“Orthodox Method of the Celestial Heart”) tradition of Daoist exorcism. According to the preface to the Shàngqīng gǔsuǐ língwén guǐlǜ (KR5b0145) by Dèng Yǒugōng 鄧有功, Ráo had been a fǔlì 府吏 (district clerk) who acted impartially in legal cases, and by virtue of his probity caused a heavenly light to descend, opening the dìcáng 地藏 (earth-treasury) and revealing to him the guǐlù 鬼錄 — the prototype of the guǐlǜ code. He is thus the zǔxiān 祖仙 (ancestor-immortal) of the tradition. The hagiographic frame places him at the Yùlóngguàn 玉隆觀 (Hóngzhōu Xīshān 洪州西山) and connects him with the cult of Xǔ Xùn 許遜. CBDB has no entry; the figure is known only through the Tiānxīn zhèngfǎ literature itself. The date 994 in the catalog meta derives from the Sānjiào yuánliú soushen dàquán and from references in the Tiānxīn zhèngfǎ scriptures themselves.
See Edward L. Davis, Society and the Supernatural in Song China (Honolulu: University of Hawai’i Press, 2001), pp. 21–41, for the historical context of the Tiānxīn zhèngfǎ tradition and the role of Ráo as its founding figure.