1. In spring, target weak branches and diseased branches, leaving strong branches and prune off weak branches that cannot bear fruit.

2. Summer pruning is a supplement to winter pruning. Cross branches, diseased branches, and upright branches should be removed first, and branches should be thinned to remove weak and dense flower buds.

3. Autumn pruning is mainly to remove yellowing branches and leaves, and also remove branches that affect growth.

4. In winter, maintain the normal growth of main and side branches through pruning, remove branches that affect growth, and strong branches should also be pruned appropriately.