In Chinese culture, which is traditionally more collectivist, group identity is paramount. The `圈子` is the modern, everyday manifestation of this principle. It's the social container where concepts like 关系 (guānxi - relationships/connections) and 人情 (rénqíng - human favor) are most actively cultivated. A helpful comparison is to the Western concept of a “clique” or “social network.” While similar, a `圈子` often implies stronger, more defined boundaries and a higher degree of mutual obligation.
Your `圈子` is a core part of your social identity. It tells people who you associate with, what you value, and what resources you might have access to.
`圈子` is an extremely common word used in various contexts, from casual chats to business discussions.