Mr. Wang Hui respects but is not stubborn to ancient,paying attention to combination of differentiation of signs and diseases; in smartly applying Canker-root Wendan Decoction,he often adds Chendanxing to reinforce removing heat and sputum,emphasizing that signs of red tongue,yellow and greasy or white moss,bitter mouth,slippery and quick pulse show sputum heat bothering internal,can apply the formula,which embodying the treatment principle of "treat different diseases with same method".