① The basic structure of the tree. The trunk height is 70cm, the tree height is 3.5m, and the trunk is relatively upright. There are 12 ~ 15 main branches on the trunk, which extend around without obvious layers. The main branch angle is 80 ~ 90, the main branch length is 1 ~ 1.2m, and there are small and medium-sized fruiting branches on the main branch.

② plastic methods. After the annual seedlings are planted, they are fixed at 80 cm. When pruning in winter and spring of the following year, the second cut bud (competitive branch) was taken as the central leading branch, and it was cut off at 1/3 branch, which made the central trunk bend and elongate, and the lateral branches from the trunk were cut off at 1/3 branch. After pruning, the branches will open when they reach semi-lignification. When pruning in winter and spring in the third year, the branches on the trunk in the second year will not be cut short, but will only be slowly put or broken. Thinning the branches that grow vigorously and coarsely and affect the growth of the trunk, taking the competitive branches as the central trunk, light and short cutting, and thinning the remaining competitive branches, leaving branches with moderate growth. When pruning in winter and spring in the fourth year, competitive branches are also selected as the central trunk, and 1 ~ 2 branches below the competitive branches are thinned, leaving medium branches. The selected main branch runs at one end, don't cut it short, remove the upright main branch and the long branch on the back. When pruning in the spring of the fifth year, when the tree grows to a certain height, it is not necessary to replace the main head, which naturally slows down the growth, and it will be updated in time after the branches are bent to ensure the top advantage. At the same time, it also maintains the growth advantages of each main branch, so that it can be updated in time and rejuvenated.