Secondary Bopomofo
Secondary Bopomofo differs slightly from HanYu Pinyin and Taiwan Pinyin. The table below lists the consonants, vowels and compound vowels used in the Secondary Bopomofo:
| Consonant | Vowel | Compound vowels | ||||||
|---|---|---|---|---|---|---|---|---|
| ㄅ | b | - | ㄧ | yi | i | ㄧㄚ | ya | ia |
| ㄆ | p | - | ㄨ | wu | u | ㄧㄛ | - | - |
| ㄇ | m | - | ㄩ | yu | ju | ㄧㄝ | ye | ie |
| ㄈ | f | - | ㄚ | a | - | ㄧㄞ | yai | - |
| ㄉ | d | - | ㄛ | o | - | ㄧㄠ | yau | iau |
| ㄊ | t | - | ㄜ | e | - | ㄧㄡ | you | iou |
| ㄋ | n | - | ㄝ | - | - | ㄧㄢ | yan | ian |
| ㄌ | l | - | ㄞ | ai | - | ㄧㄣ | yin | in |
| ㄍ | g | - | ㄟ | ei | - | ㄧㄤ | yang | iang |
| ㄎ | k | - | ㄠ | au | - | ㄧㄥ | ying | ing |
| ㄏ | h | - | ㄡ | ou | - | ㄨㄚ | wa | ua |
| ㄐ | j | - | ㄢ | an | - | ㄨㄛ | wo | uo |
| ㄑ | ch | - | ㄣ | en | - | ㄨㄞ | wai | uai |
| ㄒ | sh | - | ㄤ | ang | - | ㄨㄟ | wei | uei |
| ㄓ | jr | j | ㄥ | eng | - | ㄨㄢ | wan | uan |
| ㄔ | chr | ch | ㄦ | er | - | ㄨㄣ | wen | uen |
| ㄕ | shr | sh | - | - | ㄨㄤ | wang | uang | |
| ㄖ | r | - | - | - | - | ㄨㄥ | weng | ung |
| ㄗ | tz | - | - | - | - | ㄩㄝ | yue | iue |
| ㄘ | tsz | ts | - | - | - | ㄩㄢ | yuan | iuan |
| ㄙ | sz | s | - | - | - | ㄩㄣ | yun | iun |
| - | - | - | - | - | - | ㄩㄥ | yung | iung |
Remark
| ㄐㄧㄠ | jieu | |
| ㄋㄩㄝ | niug |