Tree structure. The trunk is 50 cm high, the central trunk, and the tree is 3 ~ 3.5 meters high. There are three main branches on the first floor, one next to the other. There are two main branches on the second floor, which are 60 ~ 80 cm apart from the main branches on the first floor. Each main branch is equipped with 1 ~ 2 side branches.

Plastic surgery. It dried at 70 cm in the first year. Select the three main branches under the incision, remove the competitive branches and leave the trunk. In winter cuttage, the first layer of the three main branches is shortened by 50 cm, the main extension branches are shortened by 70 cm, and the cut competitive branches should be thinned. In the spring of the following year, two branches with good growth angles and staggered directions were selected from the first layer of main branches as the second layer of main branches to control the growth of other branches, and the top was picked in summer to control straight branches and imaginary branches. When cutting in winter, cut the main branches of the second layer by 60 cm, remove the competitive branches, and slowly put the remaining branches in. The height of the tree is controlled at 3 ~ 3.5 meters, and the head falls when it is 5 years old, forming a small crown with sparse layers.