a person recognized as an accepted member of a particular group, typically one that is exclusive in some way自己人
us and them (or them and us)
expressing a sense of division within a group of people我们和他们，自己人和非自己人
柯林斯高阶英汉双解学习词典释义
PRON-PLURAL
我们
A speaker or writer uses us to refer both to himself or herself and to one or more other people. You can use us before a noun to make it clear which group of people you are referring to.
1. North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776