81 bài ngũ ngôn tuyệt cú (ứng 9×9 dương số) của NHỊ TỔ Thạch Thái — tự thuật sau «kim dịch giao kết, thánh thai viên thành» được 张伯端 truyền khẩu. Chủ ý «hoàn nguyên» (trả bản nguồn), khuyến tu giả mau tầm sư luyện kim đan («lão lai chì hư thủy thiểu»).
Ứng dụng: giáo khoa 81 Arya tiến cảnh · Nam tông nhị tổ đích truyền
北宋南宗二祖石泰（杏林、翠玄子）撰，一卷，八十一章五言绝句。序称昔在驿中遇张伯端授丹诀，证验只在片时，金液交结、圣胎圆成，故作篇授晚学，劝莫待老来铅虚汞少。丹法以铅汞成真体、阴阳结太元，行二八即可炼丹；汞为青龙髓、铅为白虎脂，采取知时、归鼎烹炼。全篇环绕还源——还其本源、复归先天——敷演药物、火候、抽添、温养，语言质朴，直承紫阳清修一脉。与《悟真篇》《金丹四百字》构成南宗早期核心诗诀系统，强调金丹可学、效验迅速。
⚡ Ứng dụng: 南宗清修者诵习以掌握铅汞二八、采取归鼎之还源法要，及时修炼勿待衰老。
🔗 Liên quan: 悟真篇；金丹四百字；还丹复命篇
All cultivation is homecoming: phenomena are waves; the source is one water. The text proves that practice succeeds when attention and vitality reverse from branching multiplicity to the unmarked origin—return (huan) is both method and goal.
1) In BaZi “outflow” years (heavy output/hurting officer), emphasize return practices: evening silence, breath-to-root, fewer projects. 2) Use a single daily “return cue” (bell, sunset, three breaths) as huan yuan drill. 3) When analyzing chart desire patterns, ask: does this choice return or further branch? 4) Meditate from senses → breath → lower field → open awareness as staged return. 5) Measure progress by speed of recovery after distraction, not by visions.
Unlike fire-phase technical manuals, Huanyuan Pian foregrounds philosophical direction of the whole path. Unlike pure Chan-style suddenism, it still sits in neidan return language. Difference: teleology of source-return as the master key over apparatus.