Quánzhēn 全真 patriarch and nèidān 內丹 master, hào Bìxū zǐ 碧虛子 (“Master of the Azure Void”), 1150–1228. Author of [[KR5a0242|DZ 241 Bìxū zǐ qīnchuán zhízhǐ]]. According to the introduction of that work, late in life Yáng met Bái Yùchán 白玉蟾 (Master Hǎiqióng 海瓊先生) and a recluse called Ānrán jūshì 安然居士 at the Zhūlíng dòngtiān 朱陵洞天, i.e., Mount Héng 衡山. Although Yáng’s biography in [[KR5e0955|DZ 955 Zhōngnánshān zǔtíng xiānzhēn nèizhuàn]] 2.2b–3b does not mention his travels in southern China, the meetings are chronologically plausible.
There is here a name-clash to be flagged: the hào Bìxū zǐ was also borne by Chén Jǐngyuán 陳景元 (1025–1094), the eminent Northern-Sòng LǎoZhuāng commentator (cf. e.g., his Dàodé zhēnjīng zhù 道德真經注). Boltz, A Survey of Taoist Literature, 327 n. 569, has rightly noted that DZ 241 cannot be by Chén Jǐngyuán, on grounds both of date and of doctrinal content (which is firmly within the Quánzhēn / Southern-Lineage nèidān synthesis, with explicit citation of the Wùzhēn piān 悟真篇). The nèidān methods described in DZ 241 are generally those of the Southern Lineage (Nán zōng 南宗). No CBDB record was found.