Licorice is a perennial herb, root and rhizomes thick, is a tonic herbal medicine. It is a good medicine for human body. The medicinal part is root and rhizome. The root is cylindrical, 25 ~ 100 cm long and 0.6 ~ 3.5 cm in diameter. The skin is not tight, the surface is red brown or gray brown. The rhizome is cylindrical, the surface has bud mark, the section middle has pith. The smell is mild, sweet and special. Functions and indications heat and detoxification, expectorant cough, wan abdomen, etc. Like dark and humid, long sunshine low temperature dry climate. Licorice grows in arid and semi-arid desert steppe, desert edge and loess hilly region. Roots and rhizomes are used medicinally.