Taxus chinensis, also known as Taxus chinensis, Pinus densiflora and evergreen tree, is a rare natural anti-cancer plant on the verge of extinction in the world and a national first-class protected plant. This is a precious tree species with ornamental and medicinal uses. Paclitaxel extracted from plants is an internationally recognized anticancer drug, which is expensive. Therefore, yew is also called "biological gold". Taxus cuspidata is the branch of Taxus cuspidata. Distributed in China, Zhejiang, Yunnan, Heilongjiang, Tibet, Jilin, Hubei, Sichuan, Guangxi, Jiangxi and other provinces.

Taxus chinensis is an evergreen tree, with yellow-green or reddish-brown branchlets in autumn, strip-shaped leaves, dioecious plants and oblate seeds. Seeds are used to extract oil and medicine. It belongs to shallow-rooted plants, the main root is not obvious, the lateral root is developed, the height is 30m, and the trunk diameter is 1m[2]. The leaves alternate spirally, the base is twisted into two rows, the cords are slightly curved, the length is1~ 2.5cm, the width is 2 ~ 2.5mm, the leaf margin is slightly curved, the tip is gradually pointed, there are two wide yellow-green or gray-green stomatal zones on the back of the leaves, the midvein is densely protruded, and the green zone on the leaf margin is extremely narrow, which is dioecious. Male flowers are solitary in leaf axils, and female flowers are dioecious. The seed is oblate with 2 edges, the seed is ovoid, and the aril is cup-shaped and red.

Except the red aril, the whole body of Taxus chinensis is highly toxic, and the seeds and aril "stone cells" in it also contain toxicity. The toxic substance in Taxus chinensis is a mixture of plant alkaloids, which can cause gastroenteritis, heart disease, respiratory distress and extreme poisoning. May lead to sudden, sudden, death, death. The main symptom is convulsion, and it will be dead in five minutes.