Hazelnut is mainly produced in Turkey, widely distributed in temperate regions of Asia, Europe and North America, and also planted in Shanxi, Northeast China and Inner Mongolia of China. Hazelnut is a kind of nut, which is also a famous chestnut. It is known as the "king of dried fruits" and one of the four largest dried fruits in the world. You can eat it directly or mix it with chocolate or biscuits.

Hazelnut is cold-resistant, can survive the severe winter of -30℃, and likes humid climate. Suitable for planting in areas with annual precipitation of 700~ 1200mm. Hazelnut leaves alternate, broadly ovoid to broadly obovate, with irregular double serrations at the edges, hairless at the top, and short and soft hairs on the lower veins, 5~ 13cm long and 4 ~ 7cm； wide; Petiole length 1~2cm, densely covered with fine hairs.