① The basic structure of the tree. The trunk is 70 cm high and has a central trunk. 15 ~ 20 lateral branches are directly planted on the trunk, and the height of the tree is about 3.0 ~ 3.5 meters. Angle of lateral branches 100 ~ 120, length of lateral branches 1 ~ 1.2m, ratio of base thickness of branches to trunk 1∶0.3, crown width of about 2.5m, sharp top of trees, drooping heads at 5 years old.

② plastic methods. 1 year-old seedlings are planted and fixed at 80 cm. After germination, the first and second buds under the incision are wiped off. When the new shoot grows to 60 cm, 100 ~ 120 pulls the branch. When pruning in the winter and spring of the following year, except for the light and short pruning of the central trunk, all the other side branches are slowly put in, so that the branches are umbrella-shaped. The new buds on the trunk of the tree were also pulled open. In the third year, when pruning in winter and spring, the central trunk is lightly sheared and short sheared, and all the second and third competitive branches below the cut are thinned, and all the branches with the ratio greater than 1: 0.3 are thinned, and the remaining branches are slowly released, forming an umbrella-shaped drop-bead cluster. When pulling out branches, the long branches at the base should be thinned out in time. In the spring of the third year, the newly grown lateral branches were also pulled open by force in autumn. The pruning in winter and spring in the fourth year is the same as that in the third year, but some fruiting branches should be integrated and rejuvenated to promote flowering and ensure the absolute advantage of the central stem. Drop your head in the fifth year and keep a certain height.