Chestnut is one of the earliest fruit trees cultivated in China, with a cultivation history of about 2000-3000 years. The leaves are lanceolate or oblong, with serrated edges. The flowers are unisexual and monoecious; the male flowers are catkin inflorescences, the involucre splits when mature, and the chestnuts fall off. The nuts are purple-brown, yellowish-brown hairy, or nearly smooth, with light yellow flesh. Fruit sugar, starch, protein , fat and vitamins, minerals.