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This is certainly not a good piano music in the traditional sense, but more like an experimental musical work describing emotions.
The music repeats the four chords from beginning to end, which can be understood as the continuous cycle of daily monotony in our lives.
The change of the piano is mainly reflected in the right hand part, but no matter how the melody changes, the overall mood is still depressed.
It is difficult to explain the practical significance of music, but friends who can understand it naturally can understand it.