Walnut kernel is rich in nutrients, containing 15 to 20 grams of protein per 100 grams, more fat, 10 grams of carbohydrates; and contains essential calcium, phosphorus, iron and other trace elements and minerals, and carotene, nuclear Flavin and other vitamins. It is good for the human body. It is one of the nut foods that people love. Known as "Long live child", "longevity fruit." Also known as walnuts and flat peaches, it is the most widely cultivated variety at home and abroad. Deciduous trees, generally 10 to 20 meters high, up to 30 meters or more, the main diameter of about 1 meter, life expectancy of up to one or two hundred years, up to more than 500 years.