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Understanding Chinese Pinyin: Insulation letter y and w


In Chinese Pinyin System, the function of y, w are given sound insulation, detail as below:

1. In i column of finals, when the syllable is in zero initial, if there is another vowel after the vowel i, change i to y.

    If there isn't another vowel after vowel i, add y before i.


2. In u column of finals, when the syllable is in zero initial, if there is another vowel after the u, change u to w.

    If there isn't another vowel after vowel u, add w before u.


3. In ü column of finals, when the syllable is in zero initial, whether there is another vowel after the ü or not, add y before ü, and the two points() on the ü must be omitted.