Tree structure. The trunk is 50 cm high and has three main branches. The spacing of main branches is 10 ~ 15 cm, which is evenly distributed at the plane angle of120, and the opening angle is about 45. Each main branch has 1 ~ 2 side branches and no central trunk.

Plastic surgery. It dried at 70 cm in the first year. Select three main branches under the kerf, and the included angle of each branch surface is 120. In summer, useless branches and competing branches are thinned out. When cutting in winter, cut the main branches by 60 cm, leaving the outer buds. Except for the three main branches selected, all other competitive branches are sparse. In the second year, summer pruning measures such as cutting short, removing core, thinning branches and pulling branches were taken to continue to cultivate the extended branches of the main branches, and the first lateral branch was selected outside each main branch. The lateral branches on each main branch should be evenly distributed to avoid crossing and overlapping. The angle of the lateral branches should be larger than that of the main branches, so as to maintain the subordinate relationship of the main branches, and 2-3 lateral branches should be selected on each main branch. Finish the plastic surgery task in the fourth year.

Li Shu Xinkaixing