Finals which consist of two or three vowels are called compound finals. There are totally 13 compound finals in putonghua. When you pronounce a compound finals, glide smoothly from one vowel to another instead of jumping from one to another. According to the different positions of the main vowels, compound finals can be classified into the following three kinds: qiangxiang compound finals, houxiang compound finals and zhongxiang compound finals. ia ie ua uo ve are houxiang compound finals. Houxiang compound finals with the second component louder and clearer than the first. iao iou uai uei are zhongxiang compound finals. Zhongxiang compound final ( triphthongs) with the mid-component louder and clearer than the rest two. When iou and uei follow initials to from syllables, they wll be written as iu and ui respectively, for example: xiu and shui, with the tone-graph placed over the back vowel. The tone-graph of compound finals should be placed over the main vowel. er is a special final, which cannot be spelled with any other initials but forms a syllable by itself.

由两个或三个元音复合而成的韵母是复韵母，汉语普通话一共有13个复韵母。复韵母发音的时候，不是简单地从一个元音跳到另一个元音，而是从一个元音滑向另一个元音。 复韵母按主要元音所处前后位置的不同，可分为前响，后响，中响复韵母三类。 ia ie ua uo ve 属于后响复韵母，发音时后面一个元音比较响亮和清楚 iao iou uai uei 属于中响复韵母，发音时中间一个元音比较响亮和清楚。iou uei 与声母相拼时写作iu ui。例如：xiu shui 声调标在后一个元音上。复韵母的声调标在主要元音上。 er 是一个比较特殊的韵母，它不能与任何声母相拼，而只能自成音节。

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