Běi dì qī yuán Zǐ tíng yán shēng mì jué 北帝七元紫庭延生祕訣
Northern-Thearch’s Seven-Origin Purple-Court Secret Instructions for Prolonging Life
Anonymous; Five Dynasties
A Five-Dynasties Northern-Dipper longevity scripture. Preserved as DZ 1265 / CT 1265 (正一部).
Dating. Five Dynasties. Dynasty: 五代.