Paeonia lactiflora was first seen in Ben Jing. Tao Hongjing started out with nothing. As the saying goes, "It is best to leave Baishan, Shan Jiang and Maoshan today and grow up in vain." There are many red spots in other places, and the red ones are all small profits. "Kaibao Materia Medica" contains: "There are two kinds, the red one benefits urine and reduces qi, the white one relieves pain and disperses blood, and its flowers are also red and white. Materia Medica states: "There are two kinds of peonies, one is Jin Mudan, and the other is Mu Peony. "Jin Mudan is white and greasy, and peony is purple, thin and pulse-rich." He also said: "Today, it is everywhere, and Huainan wins. Spring is full of red buds, with three branches and five leaves on the stem, which is as long and narrow as peony and one or two feet high. There are red, white and purple flowers in summer, and the flowers are as small as peony seeds. Rooting in autumn. " Needless to say, Materia Medica says: "Peony classics were born in hills and valleys, and the users of this world are mostly planted by others." If the flowers and leaves are large, manure must be added, and the roots should be taken from August to September every year, because medicine is beneficial. "It can be seen that cultivated peony has been used as medicine in the Song Dynasty, which is divided into white fat and purple thin and multi-pulse. This is similar to the current domestic varieties of processed peony and wild thin and stringy unprocessed peony. But "Outline" Ceng Yun: "Roots are red and white, and so are flowers. "There are indeed color maps of white peony and red peony in the essence of Pinhui. This shows that before the Ming Dynasty, red peony and Bai Mudan were really distinguished by this standard. Red and white flowers sometimes affect the color of root bark, but they are not necessarily the basis for distinguishing peony varieties. At present, the root of Paeonia lactiflora and its variant Paeonia lactiflora. Most sapium plants are boiled in water and then dried. Most of the peony cultivated in the main producing areas is used as medicine, which is in line with the statement in Textual Research on Plant Names and Facts that "there are people who use medicine with single petals today", but there are still many wild species of peony.