Dān lùn jué zhǐ xīn jiàn 丹論訣旨心鑑
Heart-Mirror on the Purport of Elixir Discourses and Instructions
by 張玄德 (Zhāng Xuándé)
A Five-Dynasties Daoist alchemical summary-text surveying the purport of prior dān lùn 丹論 (elixir discourses) and dān jué 丹訣 (elixir instructions) — as a “heart-mirror” (xīn jiàn 心鑑) for the aspiring alchemist. Preserved as DZ 935 / CT 935 (Dòngshén bù, Zhòng shù lèi 洞神部眾術類).
Dating. Five Dynasties. Dynasty: 五代.