Tài xū xīn yuān piān 太虛心淵篇
Treatise on the Heart-Abyss of Great Emptiness
Anonymous; SòngYuán
A Daoist inner-alchemical meditation treatise on the “heart-abyss” (xīn yuān 心淵) within the “great emptiness” (tài xū 太虛). Preserved as DZ 1047 / CT 1047 (Tài xuán bù 太玄部).
Dating. SòngYuán. Dynasty: 宋-元.