In the past, there were two things, a gout oak gall and a horned oak gall. The gout oak gall is different from the gall of normal wood, its shape is bloated or strange, its skin is pale, and the texture is hidden. The horned oak gall is like a horn, the length of the horn is different, and the thickness is different. It is upright but standing, and it seems to be prosperous.

Both are extraordinary things, often hidden in the secluded parts of mountains and forests. A woodcutter or deep in the forest, I see it occasionally, and I am surprised by its strange appearance. Although it is not as impressive as a good wood in the forest, its unique shape also adds a bit of mystery to the forest.

When herbal collectors hear its name, they often want to find it, in order to explore its medicinal uses. However, the mountains and forests are vast, and if you want to obtain these two things, you must go through hardships and visit the deep forests. Every acquisition is cherished and hidden, hoping to play its role and cure the diseases of the world.