Pruning and shaping of umbrella-shaped bonsai: Umbrella-shaped bonsai is full of vigorous buds, and April-June and 9- 10 are vigorous growth periods. It is necessary to bask in the sun as much as possible to produce more new branches, and gradually cut off the old branches to replace the old ones. Generally, according to the size of the basin, three or five or ten branches are reserved. Cut off too many long branches and twigs, so that the plant shape is harmonious and beautiful and the charm is unique.