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Xuannüjing 玄女經 "Classic of the Mysterious Maiden" is an ancient book on prognostication. It is also called with the voluminous title Huangdi shou san zi xuannü jing 黃帝授三子玄女經. The imperial bibliography Jingji zhi 經籍志 in the official dynastic history Suishu 隋書 lists the book Xuannü shijing yaofa 玄女式經要法 among the master of the Five Agents (wuxing jia 五行家). This book is concerned with prognostication for the day of marriage.
Other books with the title Xuannüjing belong to medical texts dealing with the art of the bedchamber, like the texts Sunüjing 素女經, Yufang mijue 玉房秘訣 (Yufang bijue 玉房祕訣), Yufang zhiyao 玉房指要 or Dongfang xuanzi 洞房玄子.