| (1) U或以它为韵头的韵母单独成音节时，在其前加y, ü上两点省略。 When there is no initial before the final ü or a final starting with ü in a syllable, we add y before the final. The two dots above ü are dropped. ü→yü üe + yüe (2) i单独成音节时，其前加y。 When there is no initial before the final i in a syllable, we add y before the final. i→yi (3)以i为韵头的韵母单独成音节时，将i改为y。 When there is no initial before a final starting with i, we change i into y. iao→yao iou→ you (4) u单独成音节时，其前加W。 When there is no initial before the final u, we add w before the final. u→wu (5)以u为韵头的韵母单独成音节时，将u改为W。 When there is no initial before a final starting with u, we change u into w. ua→wa uai→wai uan→wan uang→wang (6)ü 或以ü为韵头的韵母与j、q、x相拼时，ü上两点省略。 When the final ü or a final starting with ü is preceded by j, q and x, the two dots above ü are dropped. ü→ju qu Xu jun quan xue (7) iou、uei、 uen三个韵母与声母相拼时，要写为iu、ui、un。 When preceded by initials, the finals iou, uei and uen are shortened as iu, ui and un respectively. iou→iu: jiu qiu xiu diu uei→ui: tui gui zhui sui uen→un:lun kun dun shun |