 These often included drawing trigram images from the world around them and the events they were inquiring about and using a system to associate hexagrams with each hour.The Song Dynasty Yi Jing scholar Shao Yong is said to have used the Forest of Changes as part of his system of Plum Blossom Numerology.Dating the Text

The following items lend credence to at least portions of the text being written later than the lifetime of Jiao Yan Shou (1st century BCE), the purported author