Late-Southern-Sòng nèidān 內丹 commentator, zì Zǐyě 子野. Author of one of the three commentaries collected in DZ 142 Zǐyáng zhēnrén Wùzhēn piān sānzhù (alongside Xuē Dàoguāng 薛道光 and Chén Zhìxū 陳致虛). His Wùzhēn piān preface — preserved at the head of DZ 142 — opens with the maxim “When upright men practise heretical methods, the heretical methods all become upright; when heretical men practise upright methods, the upright methods all become heretical” 正人行邪法邪法悉歸正邪人行正法正法悉歸邪, and emphasises the yīnyáng foundation of the elixir-art and the danger of the sānfēng cǎizhàn 三峰採戰 sexual misreading. His personal dates and biography are unknown; he is mentioned by Chén Zhìxū in DZ 1067 Shàngyángzǐ jīndān dàyào (preface 5a) and in the editorial apparatus of DZ 143 Sānchéng bìyào. No CBDB record found.