When the tree rings add another ring, a person becomes one year older. The growth of a tree's annual rings means that one year has passed. Today, the tree has experienced one cycle. The remaining one year old means that the tree's annual rings have increased by one circle, and the person is one year older. This sentence comes from Zhu Chen's poem, The original sentence is that one life is as long as the grass and trees are in autumn. Now that the tree has passed through one cycle, and I have grown one year old, I should be more enlightened.