Baiguai duanjing 百怪斷經 is a text on soothsaying compiled during the Song period 宋 (960-1279) by Yu Hui 俞誨.
It compiles various methods of soothsaying, namely snoozing (Penti zhan 嚏噴占), "dancing eyes" (Yan tiao zhan 眼跳占), a trembling heart (Xin jing zhan 心驚占), "hot ears" (Er re zhan 耳熱占), "humming ears" (Er ming zhan 耳鳴占), and crows crying (Ya ming zhan 鴉鳴占). Each physical phenomenon is interpreted based on the time of day it occurs.
The text is included in the series Shuofu 說郛 and Jujia bibei 居家必備.