Longan (Kai Bao Materia Medica) is the aril of Longan of the Sapindaceae family. It is mainly produced in Guangdong, Guangxi, Fujian and Taiwan. The fruit is ripe in early fall and is picked when it is yellowish brown. Alias: Yi Zhi, Gui Yuan, Longan, Round Eye. Sexual flavors and attributes: sweet, warm. It enters the heart and spleen meridians. Effects: Tonifying the heart and spleen, nourishing blood and tranquilizing the mind. Indications: 1. Insufficient endowment, loss of nourishment in the latter part of the body, deficiency and fatigue. Longan meat 60g, sugar 3g, Sheng bamboo type porcelain bowl, the bowl mouth covered with a layer of silk, day after day in the rice pot on the steam, steam until many times. Each time to take a spoonful of boiled water. 2, excessive thinking, labor injury to the heart and spleen, qi and blood deficiency, palpitations and anxiety, insomnia and forgetfulness. Longan 250g, soaked in 1500ml white wine, 1 month after opening and drinking. 3.Spleen deficiency and diarrhea, postpartum swelling, qi deficiency and edema. Dried longan, ginger, jujube in moderation, decoction to take. Clinical applications: 1, neurasthenia. Longan meat 15g, fried jujube kernel 30g. Add water, moderate amount of water, decocted over a gentle fire for 30 minutes, discard the dregs and take the juice, adjusted with the right amount of sugar, every night before bedtime. 2, pruritus and urticaria. Longan 売30g，加水1000ml，浸泡2小时，大火煮沸，改文火继续煎20分钟，放凉后用药汁擦洗患处，每日2次，连用7天。 3.Celiac Disease. Longan meat 20g, cornelian cherry 10g, rice 50g, salt, porridge, take in the morning, the afternoon plus soak longan meat 20g as tea, consecutive service 1 ~ 3 months, avoid eating oil during this period. Modern research: 1, longan meat extract has obvious anti-stress effect, can promote growth and development, and has the effect of strengthening the body. 2, Longan polysaccharide has the role of scavenging reactive oxygen radicals, but also has obvious anti-anxiety activity. 3, Longan flower extract has the effect of inhibiting the development of rectal colon cancer. Use Note: Gas congestion and bloating, yin deficiency and fire, dampness and stagnant drinkers should not eat.