Gwoyeu Romatzyh
Based on the earlier and more complex Gwoyeu Romatzyh, the tentative version of MPS II was released on May 10, 1984, by the Taiwanese Ministry of Education. After two years of feedback from the general public, the official version was established on January 28, 1986. To distinguish Zhuyin from the Mandarin Phonetic Symbols II ("Mandarin Zhuyin Symbols II"), the first Zhuyin is officially called "Mandarin Phonetic Symbols I" ().