According to the "Compendium of Materia Medica", there is a kind of thing named "Horn double", which is shaped like a small rhombus and resembles a soappod, and is born on a tree. Its tree is of the genus Quercus, and its leaves are like quercus leaves. Horn double is parasitized by the gall aphid on its shoots and stimulates tissue proliferation.

Horn double has a wide range of uses. Doctors take it and it can be used as medicine. Its properties are sour, astringent, and flat. It has the effect of converting the lungs and lowering fire, astringent intestines and relieving diarrhea, sweating, stopping bleeding, and collecting dampness and astringent sores. It can treat lung deficiency and chronic cough, chronic diarrhea and diarrhea, spontaneous sweating and night sweats, hemorrhoid blood in

In dyeing workshops, horn times are also very useful. It contains a lot of tannins, which can be used as a mordant for natural dyes, helping the color to adhere to the fabric, making it bright and lasting.

Those who pick herbs in the mountains are familiar with where horn times are. Every season, they climb up and pick and return. Or sell them in pharmacies, or use them for emergencies. Although horn times are small, they have their value that cannot be ignored in medicine, dyeing and weaving, etc.