What techniques are used in the poem Cloud, and what thoughts and feelings does the author express?

This is an allegorical poem, symbolized by clouds. The poet personifies the cloud, empathizes with the scenery, expresses his feelings of exile with the scenery of blue sky and flying clouds, and sets off his unfortunate grief and indignation because he loves the motherland with the scenery of "forever indifferent, no motherland".

The second section uses rhetorical devices of rhetorical questions: these words are the climax of this poem. The author made a powerful accusation against his persecutor with overwhelming momentum and eloquent language, and also made a wonderful defense of his "crime"! "Who is persecuting you: the man who judges fate? Secret jealousy? Or openly slander? What bothers you is your own crime, or the malicious slander of your friends? "

Function in the expression of thoughts and feelings: The author here is asking the clouds on the surface, but in essence he is accusing the czar of dictatorship, persecuting and framing his own villain, and the artistic conception is in harmony with the scene, achieving a touching artistic effect.