Zhangzhou walnut is a walnut genus of deciduous family, deciduous tree, germinated every year in late March, flowering in late April, and matures one week after the beginning of September. The tree is strong, the branches are thick, the crown is semi-circular, the tree is tall and the branches are beautiful, the shade is cool and the fragrance is fragrant, and the life span can reach four or five hundred years. Representative varieties include Dalongyan (Jinlong No.1), Xiaolongyan (Jinlong No.2), Zhonglin No.1, and Weinan No.3. Judging from the spore powder analysis of the geothermal data of the Fuyang and the distribution of walnuts in the existing rocky mountain areas, the cultivation history is about 2000 years.