Tuniujing 土牛經

Tuniujing 土牛經 is a text on prognostication written during the Song period 宋 (960-1279) by Xiang Meng 向孟, of whom nothing is known.

This book relies on the theory of the Five Agents to explain the method of making clay oxen (tuniu 土牛). In ancient times, a clay ox would be brought out in the twelfth lunar month to drive away the cold. Later, during the Beginning of Spring (lichun 立春), clay oxen were made to encourage agricultural work.

The book is not listed in ancient bibliographies, but a Tuniujing is listed among agricultural books in the bibliographical chapter of the dynastic history Songshi 宋史. However, it is unknown whether this entry refers to the Tuniujing included in the series Shuofu 說郛, Wuchao xiaoshuo 五朝小說, Wuchao xiaoshuo daguan 五朝小說大觀 and Yimen guangdu 夷門廣牘.