How do the four tones of Chinese characters appear in the singing of Suizi, a Beijing opera?

"Singing by the word" is the artistic decision and experience summary of China's traditional singing method for thousands of years, and it is one of the greatest characteristics of China's traditional opera singing method. It is a traditional technique of cavity-building, which has been used in the creation of contemporary China vocal music works, and it is also one of the important means of expression of singing language, with distinctive national characteristics. Chinese in our country pays attention to words and intonation. Different tones have different meanings and even opposite meanings. In singing, the language modality, intonation, tone and language potential of lyrics are handled differently, and the expressive force of music is also different, so the tone should be adjusted with the words. Therefore, only by understanding, inheriting, mastering and applying "singing by words" can we achieve the artistic effect of combining words and sounds skillfully in the singing of national vocal music works, which is of great significance to improving the singing level. The so-called "singing by words" means singing according to the pronunciation structure of words, and "speaking" is the basis and foundation of "singing", which requires "singing with words" and "leading words". Melody should be based on the rise and fall of the tone, and the tone should follow the tone, so that the singing can be accurate and complete. "Pronunciation and mellow voice" is an important creative principle of China's traditional vocal music art. Wei Ming Fu Liang's Qulv records that "there are three unique skills in music: clarity of voice is the first skill, purity of voice is the second skill, and flatness is the third skill", which illustrates the dialectical relationship between words and voice. And "following the word", "following the word" and "leading the word" are the important methods and steps of "orthography and roundness". "According to the words, line cavity" puts orthography in the first place, cavity follows, and achieves the unity of orthography, orthography and cavity circle.