1, pruning in the first year after planting, and short cutting at the height of 0.8- 1.2m, with the first bud under the incision as the extension branch of the main branch and 3-4 stout new branches under the first bud as the main branch. Branches should be evenly distributed, not on the same track, but the difference between up and down should not exceed 5cm, and spread upward at a 45-degree angle. After the main branch is selected, the heart should be properly removed during the growth period to promote its sturdiness.
2. When cutting in the winter of the second year, the extension branches of the main branches should also be appropriately cut short, and strong buds should be selected, and the direction of the buds should be opposite to that of the extension branches of the main branches in the first year, and the main branches should also be cut short, leaving thick outer buds.
3. When cutting in the winter of the third year, the direction of the trunk extension branches is opposite to that of the trunk extension branches in the second year. When the second layer of main branches is selected, the outer buds are also kept, and they are scattered with the main branches in the second year after growth.
4. In the fourth year, the main branches of the third layer are selected according to the method of cutting in the winter of the third year. Form a patchwork "evacuation layered" tree.