1, thinning, that is, cutting branches from the base. Through thinning, the stump has good ventilation and light transmission, concentrated nutrition supply and vigorous growth. Early thinning of young trees can be beneficial to normal development and growth; Thinning during plastic surgery can make the left modeling branch get sufficient nutrition and accelerate modeling; By thinning, the molded product can balance nutrition and make it old and lasting.

2, short cutting, that is, cutting the long branches short, stimulating the axillary buds under the cut to germinate and form strong side branches, thus achieving the purpose of promoting their branching and facilitating modeling. In plastic surgery, after thinning the redundant branches, it is necessary to cut the remaining modeling branches short, so that the modeling branches sprout 2 ~ 3 times a year. Once sprouted and chopped, the number of branches of modeling branches will increase rapidly, and the order of each branch will be shortened without lengthening the branches.

3. Shrinking and pruning, that is, shrinking and pruning perennial branches, is a powerful measure to shrink big trees, and also an important means to promote the germination of new branches and restore tree vigor. The posture of the stump is good, but for garden plants with long main branches, short cutting and thinning of annual branches alone can not meet the requirements of garden modeling. By reducing the cuttings, the big trees can be made smaller, which is beneficial to landscape modeling. For some tree species with strong germination ability, the cutting amount can be larger, that is, the branches and leaves can be trimmed, and only the skeleton of the stump can be retained to stimulate the germination of new branches under cutting.