The growth period and vitality of Toona sinensis have reached 50 or 60 years, and there is no problem at all. It has not been attacked by pests and diseases, and it has not been cut down. The growth period reaches 100 years.

Ailanthus altissima is a deciduous tree whose bark is gray to gray-black. It was originally named Ailanthus altissima and Ailanthus altissima, and it was named after the smell from the glandular points at the base of leaves. 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. Ailanthus altissima is a deciduous tree whose bark is gray to gray-black. It was originally named Ailanthus altissima and Ailanthus altissima, and it was named after the smell from the glandular points at the base of leaves. 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.