In this poem, the poet's emotional tone is sad.
3. Why do I feel that its rhyme is irregular? Is this rhyme more flexible in musical expression? (Not sure about this question)
4. I think the sentence "This is a poem in the sky, slowly recording the heart that has been stagnant in the clouds with silent notes" is very good. It not only depicts the scene of light snowflakes falling slowly from the air, but also endows people with feelings for snow without feelings, making this image more touching from the heart.