Zhuyin fuhao, Zhuyin or Bopomofo (pinyin: bōpōmōfō; Jyutping: bo1 po1 mo1 fo1, Mandarin IPA: [pu̯ópʰu̯ómu̯ófu̯ó]) is a system of phonetic notation for the transcription of spoken Chinese, particularly the Mandarin dialect. The first two are traditional terms, whereas Bopomofo is the colloquial term, also used by the ISO and Unicode. Consisting of 37 characters and four tone marks, it transcribes all possible sounds in Mandarin. Zhuyin was introduced in China by the Republican Government in the 1910s and used alongside the Wade-Giles system, which used a modified Latin alphabet. The Wade system was replaced by Hanyu Pinyin in 1958 by the Government of the People's Republic of China, and at the International Organization for Standardization (ISO) in 1982. Although Taiwan officially aband