1, single stem modeling: cut off all branches growing at the base, and do not form clusters.

2, pruning method: when pruning, cut off the branches from the base, for example, cut in the middle of the branches, then a lot of branchlets will grow in this part, which not only affects the tree shape, but also the flowering part is not good.

3. Cluster modeling: stems should be pruned early to reduce the number of roots. If the branches are dense, all the old branches, poorly growing branches and branches that disturb the plant shape should be cut off to facilitate ventilation and lighting.