Mandarin Phonetic Symbols II

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Mandarin Phonetic Symbols II (MPS II) is a romanization system formerly used in Taiwan. It was created to replace the complex Gwoyeu Romatzyh system, which used tonal spelling—and to co-exist with the Wade–Giles romanization as well as bopomofo. It is sometimes referred to as Gwoyeu Romatzyh 2 or GR2.