What is that type of Chinese opera in which the intonation of each word is drawn out for a long time?

Looking at the meaning of your question, it seems that you are not talking about the singing voice, but the speaking voice (the speech). Speaking in opera is called nianbai. It is said that the recitation is like singing, with many words being drawn out (but it should not be "every word" as you said). This kind of recitation is called rhyme and Bai. All operas have rhymes, which give ordinary speaking sounds the dynamic feel of music, greatly enhancing the appeal of language.

The throwing tune mentioned on the first floor should appear when singing. It is to sing multiple notes on one word, ranging from a few to dozens of notes, forming ups and downs. melody. This kind of accent does not appear in every word. It is generally used on lines that need to be rendered, especially at the end of a libretto.