Ailanthus altissima, a deciduous tree of Ailanthus altissima in Araceae, whose bark is gray to gray-black, was originally named ch (Ailanthus altissima), also known as Ailanthus altissima and Ailanthus altissima. It is native to the northeast, central and Taiwan Province provinces of China. Growing in a mild climate. This kind of tree grows rapidly and can reach the height of15m in 25 years. This species has a short life span, and rarely survives for more than 50 years.

This species grows well in limestone areas, and can be used as afforestation tree species in limestone areas, as well as landscape trees and street trees. Wood is yellow and white, which can be used to make farm tools and vehicles; Leaves can be fed to Toona sinensis (wild silkworm); Bark, root bark and fruit can all be used as medicine, which is equivalent to clearing heat and promoting diuresis to stop dysentery. Seeds contain 35% oil. This species reproduces itself in many cities in North America, Europe and Asia and becomes a "weed tree".

Related examples:

1, Ailanthus altissima bark comes from two different families and genera of plants, with different antibacterial effects and different components, so it is not suitable to mix them.

2. Like longicorn larvae, debt-avoiding moths, borers, Ailanthus altissima, locust eggs, ants, etc. They are all woodpeckers' favorite foods, and most of them are forestry pests.

3. Soxhlet extraction method was used to extract the active components from Ailanthus altissima and oleander with different extraction solvents, and their preliminary detection was carried out.

But since the clock was installed, the old clock has stopped ringing and the rope pulling the hammer has been broken. Standing on a stout Ailanthus altissima tree, the old clock seems to have faded out of the life of teachers and students.