How to respond coldly to the information of your predecessor?

My personal opinion is that the coldest thing about my ex is to ignore her.

I don't know if I misunderstood or what the reason was. I think all people who are willing to say those two words to their predecessors basically have the idea of getting back together.

So the real cold is to ignore him at all and let him know that I would rather send a circle of friends when I see his news. Didn't you say that ignoring him hurts the most? You just ignore him and don't take him seriously.

If you break up, you still have to establish a working relationship. You can imagine him as an unfamiliar classmate, teacher or leader. You can chat with an unfamiliar person at will, refuse all jokes and chats, and don't give him any chance to show warmth.

The words used are probably "good", "good", "well" and "got it", all of which are cold short sentences. No words, no expressions, no modal particles, which made him feel like an iceberg.