The purpose of shaping and pruning is: young trees cultivate reasonable skeletons and quickly form crowns; The trees put into production are open and transparent, with robust and stable fruiting branches, which can help the weak and restrain the strong and balance the tree potential, expand the crown (control the crown) to maintain the effective fruiting amount, and make the trees plump. Pruning in Shanghai can be divided into two periods: winter and summer. Winter pruning (dormant pruning) occurs in late February to late February of 18, mainly in 10.