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In page Wade–Giles:

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Taiwan used Wade–Giles for decades as the de facto standard, co-existing with several official romanizations in succession, namely, Gwoyeu Romatzyh (1928), Mandarin Phonetic Symbols II (1986), and Tongyong Pinyin (2000). Under Ma Ying-jeou's Kuomintang (KMT)-led government, in 2009, Taiwan officially adopted pinyin, and the English romanisations on a number of street signs in cities with then Kuomintang mayors were switched over to conform to this.[4][5] However, the majority of the people in Taiwan, both resident and overseas, still use spelling and transcribe their legal names based on the Wade–Giles system, as well as the other aforementioned systems.[citation needed]