Pruning and shaping are usually carried out after flowers wither. If there is no need to seed, the residual flowers should be cut off in time after the flowers wither to avoid consuming nutrients. At the same time, too many dense new buds are removed, and too long branches are cut off, so that each plant retains 5 ~ 7 full and evenly distributed branches. Keep two lateral flower buds on each branch, and cut off the others. In the spring of the following year, the sprout of the root neck should be removed in time to concentrate nutrients on the branches and promote growth and flowering.