Phonetic rhetoric "is a bit like a composer" composing "for a lyric, mainly to make the sentence have a sense of rhythm and beauty. This is very important for oral English, such as movies, TV, drama, radio, speeches and reports. That is to say, we mainly rely on oral transmission and hearing to receive information. Whether pronunciation is harmonious or not directly affects the expression effect. China's classical poems have been handed down from generation to generation for thousands of years, and many chapters are familiar to people. One of the most important reasons is that the pronunciation is harmonious and beautiful, and it can be read fluently, giving people beautiful enjoyment.