Fruit tree heightening is the main measure to increase wintering capacity of fruit trees. In cold regions, fruit trees are highly connected, and the cold resistance of fruit trees can be improved. Some fine varieties can safely winter this way. First, the high-received parts of the high-receiving parts of the site depend on the age of the anvil and the method of grafting. In the case of a high grafted part, the original skeleton can be fully utilized to restore and expand the canopy as soon as possible, destroying the ground as small as possible. Underground balance. It is usually better than 100 cm above the ground surface. Second, the method of grafting Large trees are mainly used for high-healed subcutaneous access. This method is simpler, easier to operate, and has a higher survival rate than splicing. 1. Treatment of rootstock When the rootstock needs to be grafted, cut it off at a smooth place. The section should be perpendicular to the branch and cut with a knife. Cut a knife vertically. 2. Scioning The scion cuts a long 3-5cm long noodles at the tip of the scion, and then cuts a small noodle on the opposite side of the long noodles to sharpen the lower end to form a wedge. Leave 2 buds in the scion to cut off. When the rootstock is thick, the scion can be cut a little thicker. When the rootstock is fine, it should be cut a little thin. 3. Scion insertion Insert a knife into the vertical cuts of the rootstock and gently raise the sides of the rootstock. Position the scion in the middle of the incision and cut it to the xylem. Insert the skin between the rootstock and the rootstock. 0.5 cm and then tied tightly with plastic strips.