Initials

{b, p, m, f, d, t, n, l, g, k, h, j, q, x, zh, ch, sh, r, z, c, s, y, w}

Single vowel

{a, o, e, i, u, ii}

Compound finals

{ ai, ei, ui, ao, ou, iu, ie, iie, er}

The anterior nasal vowel

{an, en, in, un, iin}

After nasal vowel

{ang, eng, ing, ong}