To sum up, we can define poetry as a literary genre that is easy to sing, easy to remember and rhythmic.
From this definition, we can see that poetry should pay attention to rhythm.
However, because our country's music has developed from the five tones of Gong Shang Jiao Yu to the seven tones of imported western music, the role of melody is not very important in modern poetry, but the role of rhyme still exists and is still very important. Just imagine, can a voice without aesthetic feeling leave a beautiful enjoyment and a deep impression on people?
Some people say that western poetry doesn't rhyme. Wrong, that was a misunderstanding. It's the translation's fault. At least before the 1980s, foreign poetry rhymed. Even if you don't know a foreign language, you can hear the rhymes of foreign songs and poems as long as you know the rhymes.