Shàng qīng jīng zhēn dān mì jué 上清經真丹祕訣
Secret Instructions on the True-Elixir of the Shàng qīng Scripture
Anonymous; Six Dynasties / Táng
A Shàng qīng alchemical / nèi dān 內丹 secret-instructions manual. Preserved as DZ 845 / CT 845.
Dating. Six Dynasties / Táng. Dynasty: 六朝-唐.