Circumcising the trunk of the blooming apple tree can improve the fruit setting rate; Trunking in the middle and late June can promote flower bud differentiation and increase the annual output. It should be noted that girdling is mainly aimed at flourishing trees of 3-5 years old, and trees with poor growth potential are generally not suitable for girdling. Ring cutting method: use a sharp knife to cut off the bark around the trunk, temporarily block the sieve tube, prevent nutrients from being transported downward, and improve the nutritional level of the tree, thus improving the fruit setting rate and promoting flower bud differentiation.