1. The grafting of chestnut trees is generally carried out in spring, and it is more suitable to be carried out from April to June every year. It can be grafted with Castanea henryi, Quercus variabilis, Quercus variabilis, etc.

2. Grafting Castanea henryi: Castanea henryi can be used as rootstock to graft Castanea henryi, but the affinity between them is weak. The survival rate of the first grafting is only 9.8%, and the success rate is very low, but the survival rate can reach 8% after another attempt. Generally, grafting is carried out in spring, and grafting is carried out by branch grafting.

3. Castanea mollissima grafted with Quercus acutissima: Generally, Quercus acutissima grafted with Castanea mollissima is grafted in spring, because the affinity between them is not strong, and the success rate will not be high, but it can still survive. Generally, the grafting method is adopted.

4. Castanea mollissima is grafted with Quercus variabilis: Castanea mollissima is grafted with Quercus variabilis from the end of May to the beginning of June. Generally, single-bud grafting is adopted, and the survival rate is generally high.