Huán dān fù mìng piān 還丹復命篇

Treatise on the Return-Elixir for Restoring One’s Destiny

by 薛道光 (Xuē Dàoguāng, 1078–1191) — Third Patriarch of the Nán zōng

Xuē Dàoguāng’s principal inner-alchemical treatise, preface dated 1126. One of the foundational texts of Southern-Lineage (Nán zōng) nèi dān. Preserved as DZ 1088 / CT 1088 (Tài xuán bù 太玄部).