Labial harmony means that a non-high vowel gets rounded by the rounded vowel of the directly preceding syllable.

唇音元音和谐律是指一个不高的元音通过它前一个音节的元音变得圆滑。

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If the first non-significant digit is 5, and all subsequent digits are 0, the last significant digit is rounded to the nearest even digit. See the example that follows.

如果第一个要舍入的数是5，后面其他的位都是0，那么这个数就会被舍入到最近的偶数。

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