Generally speaking, Wan Wen walnut is Juglans regia. Moreover, the walnut skin in Wan Wen is thicker, bigger and more wrinkled, so it is not suitable for eating. Walnuts in Wan Wen are usually picked when the green skin is green (that is, when the fruit is 78% ripe).
Common edible walnuts are called walnuts. Walnut and walnut belong to Juglandaceae. Together with almonds, cashews and hazelnuts, it is known as the world-famous "four dried fruits". Walnut kernel is rich in nutrition, with more fat and carbohydrate per 100g protein 15 ~ 20g. It also contains calcium, phosphorus, iron and other trace elements and minerals, as well as carotene, riboflavin and other vitamins. It's good for the human body. It is one of the nut foods deeply loved by ordinary people.
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Walnuts can be used as handicrafts. With the long playing time and carving time, the played walnut is colorful as agate, beautiful as jade and of high value.
Through the carving of folk artists, the images and patterns of various animals and figures are carved on walnuts to make nuclear carvings. The earliest nuclear carvings in the Ming Dynasty were made of peach stones, and it was not until the Qianlong period of the Qing Dynasty that there were nuclear carvings of flower boats and figures carved with olive stones and walnut stones. Walnut carvings in Ming Dynasty are mostly immortal figures, evil spirits, mascots and so on.