Professor MI Ziliang puts forward that light and upfloating herbs like feather should be used to treat upper-jiao（ 上焦） diseases

according to the incidence of pulmonary system diseases

as well as the physiology and pathology of pulmonary system. Light herbs stirs and may regulate the delicate Zang-viscera. Prof. MI emphasizes purifying the lung and clearing the heat

combined with ventilating lung Qi and diffusing pathogen

which is to regulate lung Qi by diffusion and purification. In practice

regulating lung

invigorating spleen and supplementing kidney should be applied flexily

or lung

spleen and kidney should be treated simultaneously. Strengthening spleen is emphasized to treat the source of phlegm production. One typical case is selected to prove the clinical application of the therapy.