First of all, we notice that the cherry in the poem should refer to the kind of fruit cherry that we often see in our lives. It usually matures around May. Moreover, the author's poems are clearly written, and this time is spring. Theoretically, spring generally refers to March and April. At this time, the cherry trees should have just begun to sprout, and there is no result yet. It can be inferred that what the author did on the cherry tree in spring should refer to the process of cherry from green to maturity.
So the author said: I want to do what I did on the cherry tree in spring. One of its meanings should be that in spring, cherries are maturing, which symbolizes that our love is also maturing. Yes, here, the author uses cherries to imply love. At this time, cherry is the love described by Nie Luda. The author uses its maturity process to symbolize the gradual maturity of love and the end of sweet fruit.
In addition, pablo neruda is open-minded and likes to explore the growth and desire of life in his works. Therefore, his work "Twenty Love Poems and a Despair Song" should also discuss the rhythm of life and the growth of desire in the name of cherry. What the author wants to explain here is that the growth process of life and desire can be as gentle as spring, with warm sunshine instead of heavy wind and rain.
Finally, I have a third understanding here. We know that cherry trees lose all their leaves in winter. But with the arrival of spring, trees begin to grow new leaves, blossom, expand their vitality and flourish. Then I understand that "what I want to do with you, what I want to do with the cherry tree in spring" means to make "you" full of vitality, happiness, happiness and beauty, which is probably what it means.