The Ruyao jing (Mirror for Compounding the Medicine) is one of the most famous texts of Taoist Internal Alchemy, or Neidan.
This book contains the first complete translation of the Ruyao jing and of the commentary.
Because of its symbolic and cryptic language, it has been subjected to different and sometimes conflicting interpretations.
Written in the 10th century and attributed to Cui Xifan, it describes the foundations of Internal Alchemy in 20 short poems of four verses.
The Ruyao jing (Mirror for Compounding the Medicine) is one of the most famous texts of Taoist Internal Alchemy, or Neidan