I believe you will often hear some common sayings, which are relatively reasonable, because they are all the experiences summarized by predecessors through historical development. The so-called people have three relatives, that is, uncles, uncles and our aunts, because they call their mothers' sisters aunts, their fathers' sisters aunts and their mothers' brothers uncles. These three people are actually very close to us, but for their wives or husbands.
Aunt's husband, we call uncle, aunt's husband, we call uncle, uncle's wife, we call aunt. For these three people, they are only the other half of aunts, uncles and uncles, so the blood relationship is naturally dull. There is some truth in that natural statement. Everyone can also learn and understand these generations and relationships in peacetime, which is better.
In short, as the saying goes, three relatives, namely uncles and our aunts, are relatively reasonable. And judging from the generational relationship, it is true that these three people are not particularly close to us.