Bopomofo is a Unicode block containing phonetic characters for Chinese. The original set of 40 Bopomofo characters is based on the Chinese standard GB 2312. Additional Bopomofo characters can be found in the Bopomofo Extended block.
Block
History The following Unicode-related documents record the purpose and process of defining specific characters in the Bopomofo block:
Version Count L2 ID WG2 ID Document 1.0.0 U+3105..312C 40 (to be determined) N4609 doc) 5.1 U+312D 1 N3179 N3246 doc) 10.0 U+312E 1 N4695 N4739 11.0 U+312F 1 N4717 N4756 doc)
See also Spacing Modifier Letters (Unicode block) has two Bopomofo characters: U+02EA–U+02EB
References