Yú Dòngzhēn 余洞真 was a Southern-Sòng Daoist author, of KR5d0069 Wù xuán piān 悟玄篇 (“Awakening to the Mystery”) — preface dated 1229.
Yú Dòngzhēn 余洞真 was a Southern-Sòng Daoist author, of KR5d0069 Wù xuán piān 悟玄篇 (“Awakening to the Mystery”) — preface dated 1229.