Wenzhou has three phonemic tones. While it has eight phonetic tones, most of these are predictable: The "yīn–yáng" tone split dating from Middle Chinese still corresponds to the voicing of the initial consonant in Wenzhou, and the "shǎng" tones are abrupt and end in glottal stop (this has been used as evidence for a similar situation independently posited for Old Chinese). The "rù" tones, however, are unusual in being distinct despite having lost their final stops; in addition, the vowel has lengthened, and the tone has become more complex than the other tones (though some speakers may simplify them to low falling or rising tones).