1. bury chestnuts directly in the soil for preservation. In ancient times, there was no refrigerator or freezer to store food, so in order to improve the shelf life of some foods, they were usually buried in the soil for preservation, and so were chestnuts. According to this ancient storage method, they could be stored for a longer time.

2. Put it in a jar. In order to prevent chestnut from rotting due to moisture, we can preserve it in sealed jars and seal it in glass jars or ceramic jars, which can greatly improve the preservation time of chestnut.

3. Dry the chestnuts. If it is an inexhaustible chestnut, we can open it and dry it. Generally, it will be better to keep chestnuts in the sun for about a week, but it is worth noting that chestnuts can't be shelled when they are dried.