Tác phẩm nội đan Tống: chỉ yếu đan kinh, dung hợp Nam tông và toàn chân. Giảng dược vật, hỏa hầu, tam quan và chứng nghiệm. Cẩm nang hệ thống cho người học đan đạo.
Ứng dụng: Học nội đan, đối chiếu Nam tông/toàn chân
An internal-alchemy digest by Yu Xizi (玉谿子, Li Jianyi 李簡易, Southern Song), compiled as 《玉谿子丹經指要》 in three fascicles (Daozang CT 245). It synthesizes Zhong-Lü and Zhang Boduan lineages, with charts of the body microcosm, explanations of the three vehicles of elixir practice, and practical keys to gathering the medicine, firing times, and embryonic breathing. Highly valued as a systematic Southern-school handbook bridging poetic alchemical verse and stepwise praxis.
⚡ Ứng dụng: Fire-phasing calendars and selection of practice hours directly engage sexagenary stems/branches—core shared vocabulary with BaZi temporal analysis.
🔗 Liên quan: 悟真篇; 鍾呂傳道集; 還源篇
It proves that gold-fire reversion (金火還返) must be sought only inside one body, and that lineage coherence (混元宗派) is the filter against spurious external and dual-cult paths. Systematization is itself a form of protection of the Dao.
1) When chart shows strong external '財' chasing, reframe practice as return (還返), not acquisition. 2) Use the text's rejection of 身外 to discard room-temperature alchemy promises. 3) Build a personal '宗派圖' of teachers/books actually used—prune orphans. 4) Sequence: stabilize form → gather 炁 → apply fire phases, not reverse. 5) Cross-check any new technique against 'is it inside one body?'
More taxonomic and pedagogically complete than 碧虛子's intimate直指; less purely philosophical than 峴泉集. Differs from Zhong-Lü longevity poetry by inserting explicit school genealogy as a truth-condition.