The theme of the whole song is divided into three parts, with the octave jump of do and so as the dividing line. The first part is 16 beat, with a slightly wavy melody line, as if the author is sitting by the spring and recounting the past in detail, which is the emotional expression of a blind artist who has suffered from human bitterness and pain: the melody is calm and sincere, slightly sad but soft and firm; The second part, a total of 8 beats. Following the ending sound of the first part, in this paragraph, the music changes from calm and deep to slightly bright, like a ray of sunshine and hope in life. The third part is 16 beat again. This passage begins with the high octave so after the ending sound of the second part, and the music suddenly turns into excitement and high spirits, which profoundly reveals the author's inner injustice and tenacious and proud will to survive.

The theme of the whole song has been changed five times. With the presentation, extension and development of music, the feelings expressed are more fully expressed, as if a tragic picture of a painful past is displayed in front of us. The musical image created by music is relatively simple and concentrated, and many of its variations are not to express different musical feelings, but to deepen the theme. Therefore, although the speed of the whole song has not changed much, the strength has changed greatly. Whenever music longer than quarter notes is played, the intensity of the bow changes and the music fluctuates, which is exciting.