It depends on how you set it up. For example, you set the update signature and update to the space mood at the same time, so that the other party can know your mood by watching the dynamics of space friends. You can set it if you don't want to. In your QQ profile, click "Save Personal Signature to Space"? Please look at the part circled by the red line on the picture.

I hope my answer can solve practical problems for you.