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The oak tree is classified botanically as belonging to the family Crustacea, genus Quercus. There are 600 species in the genus Quercus, of which 450 are from the subgenus Quercus and 150 are from the subgenus Macrocarpus. Distributed in the northern hemisphere in mild areas, mainly in North America. China has more than 60 species of oak, distributed in Heilongjiang, Liaoning, Jilin, Inner Mongolia, Shandong, Henan, Guizhou, Guangxi, Anhui, Shaanxi, Sichuan and other provinces and regions. It is a deciduous or evergreen tree, and a few are shrubs. Leaf margin serrate, rarely entire. Male flower catkin pendulous, female flower solitary in involucre. Nut solitary, inner pericarp glabrous, rudimentary ovule located outside of seed base. The trunk is peculiarly strong, the tree shape is beautiful and colorful, branching and leafy, resistant to pruning, easy to shape, after pulling the piece of modeling crown such as Huagai, a thousand shapes, charm unique, is the landscape garden, courtyard villa area modeling landscape boutique tree species.