It criticizes two kinds of one-sidedness: one is to only see the function of the piano and only talk about "there is sound on the piano" One is to emphasize only the function of fingers and think that "sound is on fingers".
As we all know, the beautiful sound of the piano is produced by human fingers plucking the strings, and it is difficult to play beautiful music without any of them.
The poem introduces the meaning and writing of Su Shi's poem, which may be inspired by quoting Buddhist scriptures and Wei poems. The two sentences written by the poet in the form of Buddha's thirst are both a hypothesis and a rhetorical question, which shows that you can't play beautiful music by a piano or a dexterous finger.
This poem is very philosophical and full of meditation. Buddhism regards nothing, life as extinction, and pursues silence, concealment and immortality.
The truth of music is nothingness, so music doesn't matter whether it is true or not. It should be based on "harmony without silence, enjoying oneself" and "anti-smell self-nature, sex first" to achieve Zen's self-satisfaction and anti-enlightenment through inner feelings.