Ephedrae Herba (Ma Huang) belongs to astringent medicinal and Rhei Radix et Rhizoma (Da Huang) is a kind of purgative medicinal.
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The ingredient that is directed against, and has the greatest effect upon, the principal pattern or disease is called the chief or the monarch medicinal.
The quality and curative effect of certain Chinese medicinal has nothing to do with its place of production.
The deputy or minister medicinal has only one function, that is to aid the chief ingredient in treating the principal pattern or disease.
Poria(Fu Ling) is sweet, bland in flavor and neutral in nature, which has the actions of draining water, dissipating dampness, strengthening the spleen and calming the mind.