Southern-Sòng Daoist master and Dùrénjīng exegete, holding the ritual title Shàngqīng dàdòng Xuándū sānjìng fǎshī 上清大洞玄都三境法師 (“Master of the ShàngqīngDàdòngXuándū Three-Realms Canon”). Known chiefly from his authorship of Yuánshǐ wúliàng dùrén shàngpǐn miàojīng nèiyì 元始無量度人上品妙經內義 (DZ 90), a five-juan nèidān 內丹 (“inner-alchemy”) commentary on the Dùrén jīng dated 1226 — the definitive Sòng-era inner-alchemical exegesis of the scripture. Xiāo’s explicit identification of “the alchemical way and the meaning of the scripture” (dāndào yǔ jīngyì 丹道與經義) in the preface to the Nèiyì marks the programmatic turning-point in Daoist Dùrénjīng interpretation. His work is the principal source used by the forty-third Celestial Master Zhāng Yǔchū in the early-Míng [[KR5a0089|Tōngyì 通義]] (DZ 89), and remains the single most influential nèidān-style commentary on DZ 1 in the canon. No CBDB record exists.