Paeonia lactiflora is a perennial herb of Rhizopus genus Paeonia. Paeonia lactiflora can be divided into peony group and peony group. There are about 30 species of Paeonia and 8 species and 6 varieties in China. They are peony, beautiful peony, peony, Sichuan peony, Xinjiang peony and Ye Mudan. Among them, Paeonia lactiflora, alias Paeonia lactiflora, has three kinds of flowers, white, red and purple, which are widely distributed in the north and south, and are the main ornamental varieties at present.