(1) For trees with strong front and weak back, dense upper part and sparse lower part, the key point is to remove the dense and sprawling branches on the upper part of the crown, weaken the growth potential of the upper part, improve the light and nutrition in the crown first, cultivate strong buds, and then retract, so as to enrich the inner cavity. For a tree with a strong sense of hierarchy, we should not only bow our heads in time, but also be happy, and the lower branches should be cut lightly and put long, so as to achieve the effect of restraining the upper part and promoting the lower part.
(2) For plants with obvious outward migration of fruiting parts or exposed cavities and branches behind them, the branches with dense periphery can be properly drained; For branches with serious outward migration of fruiting parts, branches with good angle at the back or lower part can be selected as leading branches, which can moderately reduce the growth potential of the top to the back of the incision to promote the germination of short branches at the back, so as to cultivate and update fruiting branches or branches. This method not only promotes the germination of bare parts, but also restores the vitality of weak branches behind them.
(3) For weak trees with strong upper branches and few lower branches, some large branches with more branches can be thinned out in the middle of the crown, resulting in 1 ~ 2 wounds (but not scarring) consciously, so as to weaken the growth potential of the upper part of the crown or the top of the strong branches and promote the rejuvenation of the branches with weak growth potential in the lower part.