It is dynamic, but the signature of the space change can be seen by two friends who set the change in their personal data. It's just that they will see it in the update of space friends, and the signature should be seen in your profile.

What you see in the chat dialog is the signature, and what you see in the blank is the conversation. Of course, signatures can also be synchronized. Personally, signature is an attitude, just like a motto. Write down what you admire most, and don't deliberately pursue individuality. Talk about your mood, follow your feelings and say whatever you want.

See if you set your own signature and talk about synchronization? Let's talk about something similar to Weibo in QQ space, which can be set as QQ friends, friends network, or visible to everyone. Signature is only visible to QQ friends.