1, piper betel is also called Juniperus communis, in addition in different regions there are "sugar piper betel", "piper gourd", "hanging melon" and so on, produced in Liaoning, North China, East China, It is produced in Liaoning, North China, East China, Central and South China, Shaanxi, Gansu, Sichuan, Guizhou, and Yunnan. It grows in the understory of mountain slopes, thickets, meadows, and fields near villages at an altitude of 200-1800 meters. Its fruit, pericarp, kernel, and rhizome can be used as medicine.

2, Psidium guajava is a perennial climbing herb. Like to be born in deep mountains, thorns and thorns in the mountain cliffs and crevices. Its fruit, rind, nuts (seeds), rhizome are good Chinese medicine.