1, Carya cathayensis kernel is crisp and sweet, with rich aroma. They can be used for oil extraction and cooking, and can also be used as condiments for making candy and cakes. Carya cathayensis kernel contains 7.8-9.6% protein, more than 7 kinds of amino acids necessary for human body, and the content is as high as 25%. It also contains 22 kinds of trace elements needed by human body, among which calcium, magnesium, phosphorus, zinc and iron are very rich. According to data analysis, each kilogram of walnut kernel is equal to the nutritional value of 9 kilograms of fresh milk or 5 kilograms of eggs and 2 kilograms of beef, which is more easily absorbed by the human body than milk, eggs and beef. Nucleolus also has the effects of moistening lung and benefiting qi, nourishing blood and relieving asthma, moistening dryness and resolving phlegm, and eliminating deficiency and cold.

2. Walnut (walnut) or unprocessed walnut kernel without shell. The scientific name of walnut is walnut, which has deep roots, large crown and drought tolerance. Suitable for growing in fertile soil with good drainage and high calcium content. It belongs to the fruit of Juglans regia, a perennial deciduous tree and a woody oil plant. It blooms in April and May every year, and the fruit ripens a thousand years ago. Harvest from September to 10. Walnut skin is blue and stone fruit is spherical. Walnut originated in the northwest of China and has been planted for more than 2,000 years.

The edible part of walnut is its kernel, which is also called walnut kernel. Walnut kernel is called "longevity fruit" because of its high nutritional value. Walnut kernel contains 50% ~ 70% fat, and its fatty acids are mainly unsaturated fatty acids such as linoleic acid. It contains protein 15%, carbohydrate 10%, and is rich in calcium, phosphorus, iron, vitamin A, vitamin B2 and vitamin E, etc.