With his sensitive spiritual feelings and keen political vision, the poet deeply observed the trend of the times and the pulse of society, realized that the consciousness of our great nation had arrived, and was inspired by the image of trees standing in isolation from each other in Garden Metallurgical Industry, resulting in the association of "in the invisible depths/their roots intertwined". Ai Qing endowed the trees growing on the earth with vivid characters, and saw the potential fact that "they are covered with soil/their roots are spreading" with a unique eye, and regarded them as a symbol that a great nation is uniting and condensing into a powerful force.
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The tree was written in the spring of 1940. At that time, the great War of Resistance against Japanese Aggression had been going on for more than two years and was turning into a difficult stalemate. This great national war is giving all our people a baptism, making their souls undergo severe tempering in the war and gradually moving towards spiritual awakening. The poet Ai Qing clearly felt this, inspired and associated himself, and wrote this poem.