Walnut (Juglans regia), also known as walnut and Qiang peach, is the collective name for Juglans juglans, native to the Near East. Together with almonds, cashews, and hazelnuts, it is known as the world-famous "Four Dried Fruits". Walnuts are rich in vitamins B and E, which can prevent cell aging, strengthen the brain, enhance memory and delay aging. Walnut is also widely used in the treatment of neurasthenia, hypertension, coronary heart disease, emphysema, stomach pain and other diseases.