剃除開合兩呼嘅因素不計，同轉嘅四等「韻母」必然有一些共同特徵。如，同聲調嘅各等字，韻尾一定相同；各等韻母嘅韻腹一定係相同或係接近嘅。概括來講就係同轉各等韻母都係發音接近嘅韻母，喺一定程度上可以諧聲通押。
Regardless of the factors of shaving and closing, there must be some common characteristics with the "finals" such as turning four. For example, the ending of the rhyme must be the same for all words of the same tone, and the rhyme of each vowel must be the same or close. Generally speaking, the finals and the turn are all finals that are close to pronunciation, and to a certain extent, they can be rhymed in harmony.