Walnut, cashew nut, hazelnut and almond are also called the four largest dried fruits in the world. Walnut is rich in nutrients and fat, and also contains many trace elements such as calcium, iron and phosphorus and minerals necessary for human body, which is beneficial to human body. Walnut has a hard shell and needs to be broken open before it can be eaten. In addition, walnut trees have strong adaptability to the environment, drought tolerance, cold tolerance and barren tolerance, which are distributed in many areas of China.

2. Cashews

Cashew nuts have high nutritional value and can be used for cooking and medicine. Its shell is hard, and the kernel is wrapped inside. The kernel tastes sweet and contains high calories. Cashew nuts also have strong adaptability to the environment, and are drought-resistant, barren-resistant, wind-resistant, and have low requirements for soil. Its cold resistance is poor, and it is easily frozen when the temperature is lower than 17℃. Its growth rate is slow, it can only bear fruit after more than three years of cultivation, and it will enter the full fruit period in eight years.

3. Hazelnut

Hazelnut is an international best-selling precious dried fruit, which has the reputation of the king of nuts. Its fruit is yellowish brown, nearly spherical, and its maturity is usually between September 9- 10/October. It has a long history of cultivation in China, and it is cultivated in about 22 regions, especially in Northeast China, Shandong, Shanxi, Inner Mongolia, Henan and other places. Hazelnut is extremely cold-resistant. It can endure the low temperature of-30℃. It likes humid environment, light and sufficient light to promote the growth and fruiting of hazelnut. Its soil has strong adaptability and can grow normally in loam, clay and sand.

4. Almond

Almond refers to almond, which has extremely high nutritional value and medicinal value. Almond is mainly cultivated in Xinjiang, where the sunshine time is long, the climate is dry and the temperature difference between morning and evening is large. Only in this environment can it accumulate more sugar and oil, and the taste of Almond will be sweeter. Common almond varieties include thin-shell almond, paper-covered almond and soft-shell almond.

5. Other nuts

There are many kinds of nuts, such as almonds, pine nuts, pistachios, peanuts, melon seeds, chestnuts, macadamia nuts and ginkgo nuts.