Based on the Qi theory of the internal organs, the clinical evidence combined with the physiological characteristics of children?蒺s "liver is always surplus and spleen is always deficient", professor Xiong Lei thinks that children?蒺s illnesses are often related to emotions, and there is a lot of phlegm and dampness. So the clinical use of Si Ni San combined with Wendan Decoction plus reduction is called Chaishao Wendan Decoction, combining cold and warm, to unblock emotion and will, harmonize the central mechanism, regulate the spleen and stomach, and resolve phlegm and dampness, which is widely used in the treatment of paediatric diseases.