How does the poem Prison Song express the poet's feelings?

This is a vernacular narrative poem. This poem was written in 1942. The whole poem is divided into two sections, which are clear and easy to understand, and seem to blurt out without saying anything, but the emotion is intense, the momentum is heroic and the artistic conception is clear and complete. This is the true expression of the poet's noble sentiment, which makes readers feel shocked and moved by the awe-inspiring righteousness in the poem and respects the poet's noble personality.