Adopting the method of rooting with rootstock: firstly select a slashing part on the rootstock and cut it into the xylem, then cut the 1.5-cm long “T” shaped interface from top to bottom; 0.5 cm above the full bud of the scion Cross-cut a knife, deep up to 1~1.5 cm of wood, use a knife to quickly cut the buds from bottom to top, the length is slightly shorter than the interface on the rootstock, and the buds are attached to the "T" shaped interface of the rootstock to make the buds The forming layer is aligned with the forming layer of the rootstock (the top is aligned with one side) and can be fastened with a plastic strip having a width of 0.5 cm.