It is often discussed on the Internet whether there is friendship between colleagues and whether colleagues can be friends? Especially when the wedding is about to be held, this question is more important, because your answer determines whether to send invitations to colleagues at the wedding. For this question, someone here told you that three types of colleagues' weddings should be invited:
Friend level colleagues: in addition to work, they often get together in private and have been upgraded to friends.
Associate Level colleagues: reciprocity. Those colleagues who invited you to the wedding. Colleagues invite you to the wedding. No matter what the wedding level, it at least shows their recognition and attention to you. Therefore, you must not lose such colleagues in your wedding, otherwise you will appear to be insincere.
Office level colleagues: in the same office, the number is generally small. On weekdays, I don't see my head down and look up. I'm usually very familiar. It's a bit unreasonable not to invite them to a wedding.