The treatment principle of taiyin disease in Treatise on Febrile Diseases is that"it should be warmed and given drugs of sini series"，while the Sini tang is the main treatment of shaoyin disease.The further development of taiyin disease and further weakening of its vital qi develop into shaoyin disease，which explains that this treatment principle was established by Zhong Jing with the vision of disease development.At the same time，the dried ginger and baked licorice in Sini tang are actually the drugs for treating the spleen-stomach in middle-jiao，which reflects the thought that when the disease progresses to the stage of systemic yang deficiency it is necessary to protect the spleen-stomach in middle-jiao.Professor Men jiuzhang discovered that the state of functional failure usually appeared in many diseases of various systems progressing to the late stage，so at this time it was essential to take good care of the spleen and stomach and applied modified prescriptions based on Lizhong tang，Xiangsha Liujunzi tang and even Sini tang，which all showed a significant effect.Based on this，professor Men Jiuzhang put forward the thought of"treating serious diseases starts from the stomach"，which was in fact an in-depth understanding of thoughts of Zhongjing and had an important guiding significance for clinical medication，especially the treatment of serious diseases.