Generally speaking, fully recognized syllables refer to syllables with the same pronunciation as initials after adding a vowel (or syllables with the same pronunciation as initials after adding a vowel) (Yuan Special), that is, syllables that can be recognized directly without spelling, so fully recognized syllables should be read directly.
Youzhi Akashi Day; Keats; Yi Wu Yu; Yuan; Yin Yunying. It can be divided into two categories: flat tongue sound and spit tongue sound. There are three kinds of flat tongue sounds: Z, C and S; There are four languages: zh, ch, sh, R.