If you look at the personalized signature from the space, you may know it, because there is a record of visitors and everything you see is recorded. If you look at your personal data, the other party has no idea.

Some people will display their personalized signatures on my message bar as soon as they modify it, and then click on the page to chat with them. When they see a sign, click View from the chat bar. There are two situations: one will jump directly to the space, and the other will jump to the historical personalized signature interface. If you jump into the space, the other person will know it by checking the visitor record, but you won't know it if you don't check it, and the second person will definitely not know it.