As for rhymes, the ancient tone IV characters have all lost their stop codas and become empty-coda or vowel-final rhymes. 在韻母方面，古入聲字已全部失去塞音韻尾，變為開尾或母音尾韻母。
There are no obvious relationship between weakening of the glottal stop and the length of the tone. 喉塞尾弱化程度與入聲時長無明顯關係。
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