A: After germination in spring, one side bud is kept as the extension branch of the main branch for culture, and the other side bud is kept as the side branch or branch group for culture. In July and August, the angle is properly adjusted by stretching. New branches sprouting on the back of the main branch, or smoothing the branches to change direction, or erasing them; Branches on both sides and below the back should be kept still or properly controlled, so as not to affect the growth of main branches. Pruning the single stem with several centers, keeping the central branch upright and allowing it to grow; After the lateral buds cultured by three main branches in the plastic belt (20 cm) germinate, 3-4 new branches with suitable orientation are left for their growth; For weak branches, the robust growth can be promoted by cutting buds. Even in August and September, the supporting method will be used to adjust the bottom angle to about 60 degrees, and all the budding branches in the middle and lower parts of the main branches will be pulled out. When cutting in winter, all kinds of trunk branches will still have left and right buds, cut them according to the length of 50-60 cm, and let them out slowly without cutting the side branches and other branches.