- abbrev/^([az]).+$/$1/ #简拼(首字母) - abbrev/^([zcs]h).+$/$1/ #简拼(zh, ch, sh) - derive/^([zcs])h/$1/ # zh, ch, sh => z, c, s - derive/^([zcs])([^h])/$1h$2/ # z, c, s => zh, ch, sh - derive/([aei])n$/$1ng/ # en => eng, in => ing - derive/([aei])ng$/$1n/ # eng => en, ing => in - derive/([iu])an$/$lang/ # ian => iang, uan => uang - derive/([iu])ang$/$lan/ # iang => ian, uang => uan