Huazhou orange is mainly used in respiratory tract, such as orange house, which is extracted from the above:

Compendium of Materia Medica

Broadening diaphragm, lowering qi, resolving phlegm and drinking alcohol can make a great difference. Other medicines are expensive and new, but this one is expensive and old.

Eliminating phlegm and treating cough, regulating qi and regulating middle energizer, regulating spleen and diaphragm, and treating alcoholic diseases with stranguria should be above all drugs, and its treatment of various pains always takes its function of regulating qi and drying dampness.

The pulp of a good orange is red and white, and the effect of benefiting qi, resolving phlegm and relieving cough is twice that of other medicinal materials. . . The older his merits are, the better he becomes.

Notes on Compendium of Materia Medica

Among them, it says: "Orange peel can cure phlegm, remove greasy, promote digestion, sober up, be lenient and relieve crab poison."