Pinyin is a synonym of taichung.

As proper nouns the difference between pinyin and taichung

is that pinyin is a system of romanization (phonetic notation and transliteration to roman script) for mandarin chinese based on the mandarin dialect of the beijing area used in the people’s republic of china or pinyin can be a niger-congo language of cameroon while taichung is taizhong, the third largest city in taiwan.