Rose, a red rose, is a deciduous shrub of Rosaceae. The stem is prickly. There are purple and white flowers, which look like rose quilts and roses. It is generally used as an ingredient of candied fruits, cakes and other foods. The petals and roots are used for medicine, and purple roses are often used as medicine. Roses are also called wandering flowers and thorn roses. They are collected when the flower buds are about to open in April or May every year, and dried quickly with a gentle fire. When drying, the flowers are spread into thin layers, the corolla is downward, so that they are dried first, and then the rest are turned over to dry. If dried, the color and aroma are poor. When used as medicine, the ones with strong fragrance, large flower, thick valve, purple color and bright color are preferred. Roses are warm in nature, sweet in taste and slightly bitter in taste. They enter the liver and spleen meridians, and have the effect of regulating qi, relieving depression, and removing blood stasis. However, attention should be paid to the source. Most of the ornamental roses sold in the market have harmful substances such as pesticides and hormones, which are harmful to human health. Legal documents are not found, and there should be some detailed rules in the food safety law or food sales and distribution regulations.