12ü (/y/) is spelled u after j, q, x in pinyin since /u/ cannot occur after them.
↑Note that this symbol is rarely used, usually omitted during writing.
↑Voiced continuants (also transcribed [ɨ,ɯ] or [ʐ̩,z̩]) reflecting the character of the preceding consonant
123wei, you/yu, wen/wên are spelled respectively ui, iu, un in pinyin and Wade-Giles but are pronounced identically when they are preceded by a consonant.
↑⟨ê⟩ is spelled as ⟨o⟩ after ⟨k, k', h⟩ in Wade-Giles.
↑⟨uo⟩ is spelled ⟨o⟩ after ⟨b, p, m, f⟩ in Pinyin.
↑ㄨㄛ is spelled as ⟨o⟩, except for ⟨k, k', h, sh⟩ (as ⟨kuo, k'uo, huo, shuo⟩) in Wade-Giles.