2. If the grafting method is adopted, it should be carried out in spring, preferably when the juice of the rootstock begins to flow.

3. Bud grafting takes a long time. As long as the plant grows vigorously in the season, the cortex of the rootstock should be peeled off and the survival rate will be higher.

4. In addition, we should pay attention to the maintenance after grafting, and don't let the grafted parts get wet, otherwise it is not conducive to survival.