Doing a good job this year is conducive to the early healing of wounds. The sap will flow with the weather change next spring, so it is difficult to grasp the time. Pruning will cause a large loss of stored nutrients. The pruning of newly planted saplings is called fixed stem. The fixed stem height in mountainous area is 80 cm, and the water in Sichuan is about 1 m, and the pruning is selected when the buds are full. After cutting, apply healing agent to the wound in time. And set up plastic bags to keep water and cold.