hàn / yǔ / pīn / yīn / zhōng / de / fù / hé / mǔ / yīn / yóu / liǎng / gè / yuán / yīn / yīn / sù / zǔ / chéng

汉语拼音中的复合母音由两个元音音素组成。

A diphthong in Chinese pinyin consists of two vowel sounds.