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. 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".

Tree is a modern poem written by the modern poet Ai Qing in the spring of 1940. The moral of this poem is various, because the images it uses can have many meanings. This poem describes a natural phenomenon on the surface; Broadly speaking, this poem may be a description and praise of friendship, a feeling and interpretation of life, and a yearning and reflection on free life. It is precisely because of the diversity of images that this poem has a thought-provoking charm. The lines of the whole poem are neat, quite in the style of modernist poetry.