There are dozens of common nuts, such as chestnut, hazelnut, cashew nut, walnut, melon seeds, almond, jujube, pistachio, hazelnut, peanut, pine nut, etc. Nuts have hard skins, contain 1 seed or multiple seeds, are rich in nutrition, and contain protein, oil, minerals and vitamins. Regular consumption can enhance physical fitness and be beneficial to human growth and development.

Among them, the king of nuts is hazelnut, also known as chestnut, chestnut or pestle. It is a deciduous shrub or small tree of the genus Corylus in betulaceae, with a height of about1~ 7 m. It is one of the four largest dried fruits (walnuts, almonds, hazelnuts and cashews) in the world and has the reputation of "king of nuts".