Northern-Sòng Daoist, hào Hùnyīzǐ 混一子 (“Master Mixed-into-One”), of Zhānggòng 章貢 (modern Gànzhōu 贛州, Jiāngxī). The author of [[KR5a0150|DZ 149 Xiūzhēn tàijí hùnyuán tú 修真太極混元圖]], an illustrated nèidān 內丹 treatise of the ZhōngLǚ 鍾呂 transmission. According to his own preface, dated guǐmǎo, Xiāo received the secret of the jīnhuǒ huánfǎn 金火返還 (return-and-revolution of metal and fire) from a “former teacher” who took pity on his austerities; he travelled to Nanjing where he encountered (in vision or reality) the Táng patriarch Shī Jiānwú 施肩吾 (Huáyáng zhēnrén 華陽真人) and based his diagram on Shī’s lost Xiūliàn tàijí hùnyuán tú 修煉太極混元圖. The work is closely linked to the practice expounded in the Xiūzhēn zhǐxuán piān 修真指玄篇 of [[KR5c1017|DZ 1017 Dàoshū]] 19. No CBDB record was found.