Canonical Chinese Medicine is the style of Chinese medicine practiced along the tenets codified in the Western and Eastern Han dynasty (approx. 200 BC- 200 CE) medical classics or canons. It is the foundation of both clinical and theoretical Chinese medicine as we know it. Canonical Chinese medicine is comprised of two main schools being the Yellow Emperor huangdi 黄帝school of Medical Canons yijing pai 醫經派and the Divine Farmer shennong 神农school of Canonical Formulas jingfang pai经方派.