As for rhymes, the ancient tone IV characters have all lost their stop codas and become empty-coda or vowel-final rhymes. 在韵母方面,古入声字已全部失去塞音韵尾,变为开尾或元音尾韵母。
There are no obvious relationship between weakening of the glottal stop and the length of the tone. 喉塞尾弱化程度与入声时长无明显关系。