What is the theme of the whole poem "Pipa Story", and which sentence is the sound of the feelings between the poet and the pipa girl?

Theme of the whole poem:

By writing about the misfortunes of Pipa girl's life, combined with the poet's own blow on her official career, she sang the voice of "We are both unhappy-we meet each other forever". We understand. What is the relationship between acquaintances? ”。 Social unrest, the indifference of the world, sympathy for the fate of the unfortunate, and feelings of frustration are all poured into the poem. Its artistic success also lies in the use of beautiful and distinctive language with musical sense, and the use of visual images to express the feelings gained by hearing; The natural scenery and parting of the bleak autumn wind make the work more touching.

* * * Ming sentence:

Neither of us is happy-forever, we meet. We understand. What is the relationship between acquaintances? !

They are also poor people who have fallen to the end of the world. Why do you ask if you have met when you meet today?

Extended data:

Appreciation: In this poem, the poet made great efforts to create the image of a pipa girl, which profoundly reflected the tragic fate of insulted and damaged musicians and artists in feudal society, and expressed the feeling that "neither of us is happy-to grow old forever". At the beginning of the poem, I wrote "seeing guests off in autumn night", "suddenly smelling" and "playing the pipa", so I asked for a voice "secretly asking" and "moving the boat" and invited to meet each other. After a long time, the singer came out with his mask half open. This kind of echo and tortuous description laid the foundation stone for the theme of "doomsday reduction"

Then through the description of the music played by the pipa girl, the inner world of the pipa girl is revealed. First of all, there is love in the unfinished music, and then there are strings, sounds and readings, which show the ups and downs of the pipa girl.