The tune of water was written by Su Shi, a great writer in the Song Dynasty, during the Mid-Autumn Festival in Mizhou on 1076. This poem is based on the feeling that the moon rises and my brother Su Zhe hasn't seen for seven years. It imagines and thinks about the Mid-Autumn Moon, and integrates the feelings of joys and sorrows in the world into the philosophical pursuit of life in the universe, which reflects the author's complex and contradictory thoughts and feelings, and also shows the author's optimistic spirit of loving life and being positive. The first paragraph reflects the persistence of life, and the second paragraph shows pleading with the moon in life. The style of writing is natural and unrestrained, the emotion and scenery are harmonious, the environment and thought are integrated, the thought is profound, the realm is lofty and full of philosophy, which is a model of Su Shi's ci.