Professor Mao De-xi believes that the disorder of ,qi, movement of the spleen and stomach is the fundamental cause of spleen-stomach diseases. Stagnation of liver ,qi, can directly affect the functions of the spleen and stomach. Spleen-stomach diseases are mostly related to dampness pathogen, and dampness pathogen stagnation makes the function of the spleen and stomach in disharmony. Professor Mao treats spleen-stomach diseases with method of"using medicinals in small dose and of light nature", pays attention to the application of aromatics, and draining dampness with bland diuretics. In clinical practice, he emphasizes tongue diagnosis. When the fur is thick and greasy, he often uses fragrant and light clear products to remove turbid ,qi, and activate spleen ,qi, so Agastache Three-Ingredient Beverage is adopted to invigorate the spleen, remove dampness, and harmonize the spleen and stomach. The common aromatics for regulating ,qi, include: "four flowers"[Houpohua (,Flos Magnoliae Officinalis,), Foshouhua (,Flos Citri Sarcodactylis,), Baibiandouhua (,Semen Lablab Album,) and Daidaihua (,Flos Citri Aurantii Amarae,)], "three nuds"[Maiya (,Fructus Hordei Germinatus,), Guya (,Fructus Setariae Germinatus,) and Daoya (,Fructus Oryzae Germinatus,)], Baidoukou (,Fructus Amomi Kravanh,), Dingxiang (,Flos Caryophylli,), Baizhi (,Radix Angelicae Dahuricae,), Muxiang (,Radix Aucklandiae,), Chenpi (,Pericarpium Citri Reticulatae,) and Houpo (,Cortex Magnoliae Officinalis,). In addition, Professor Mao also uses Fuling (,Poria,), Dongguapi (,Exocarpium Benincasae,), Heye (,Folium Nelumbinis,), Yiyiren (,Semen Coicis,), Chixiaodou (,Semen Phaseoli,), Siguapi (,loofah rind,), etc. to drain and resolve dampness pathogen.