There are (1) metaphors in rhetoric. (2) ask questions. In addition, ups and downs are also a major feature!
3. Expressed the poet's infinite love for the motherland (because I love this land deeply).
4. The bird threw itself into the embrace of the land after its life was exhausted, and merged with the land it loved, which actually conveyed the poet's determination to devote everything to the motherland.
The poet's description of land, river, wind and dawn is a metaphor for the suffering of the motherland, the people's grief and indignation, and their yearning and hope for the light.
Happy reading!