After spring, the vines need pruning as soon as possible. In southern Shandong and northern Jiangsu, vines should be pruned before February 15 in the solar calendar (about 50 days before germination). Pruning too much will lead to bleeding of the vines, which will seriously weaken the trees.

For vines planted in the courtyard, the length of the main spreading extension should be about 10 knots, the length of the vines on the other side should be about 4-5 knots, and the twigs should be about 2 knots or directly cut off.

The vines planted in the field were pruned in the form of multiple main vines. As a result, the pruning length of the mother branches was about 4 knots, and the pruning length of the main vines in the shape of small dragons was about 10- 12 knots.