The full name of zh is zhūNGWén, which means "Chinese" pinyin.
When syllables starting with A, O and E are connected after other syllables, if the boundaries of syllables are confused, they should be separated by sound insulation symbols ('), such as Pio (fur coat).
Sound insulation symbol:
(1) The vowel of the words' knowing the sun and thinking about women' is i.
② When there is no vowel before the vowel in line I, it is written as yi (meaning), ya (elegance), ye (leaf), yao (Yao), you (worry), yan (smoke), yin (cause), yang (middle), ying (English) and yong (courage).
③ When there is no vowel before the vowel in line U, it is written as wu (Wu), wa (frog), wo (nest), wai (crooked), wei (Wei), wan (crooked), wen (Wen), wang (Wang) and weng (Weng).
(4) When there is no initial in front of the vowel, it is written as yu (circuitous), yue (approximate), yuan (unjust) and yun (dizzy).
When iou, uei and uen are added with initials, they are written as iu, ui and un, for example, Niu (Niu), Gui (Gui) and Lun (Lun).