Longan meat is a kind of dual-purpose food commonly used in daily life. It tastes good and has the effects of invigorating qi, nourishing blood and calming the nerves. Proper oral administration of dried longan at ordinary times can treat palpitation, insomnia and dreaminess, pale lips and tongue, less menstrual flow and amenorrhea caused by blood deficiency. Dried longan is greasy. If you take too much, it will affect the digestive function of the spleen and stomach, which will cause poor eating and bloating. Under normal circumstances, 3 to 5 grams per day can be taken orally.