There is no way to find the personalized signature of the changed QQ client. If you don't synchronize the personalized signature of QQ client to the space conversation, the system will save your personalized signature as a space private conversation by default.

Please rest assured that this private chat can only be seen by the owner, and can be deleted or set as a public chat; If you set the personalized signature as a space to talk about, that is, the personalized signature will be synchronized into a space to talk about openly.

In the setting of space.

There is a setting button in the upper right corner of the space. Click Space Settings, and the Settings page will appear. There is a "synchronization setting" on the left. There are sync friends above the content bar next to you, sync QQ signature and sync Weibo. Click "Synchronize QQ Signature" and "Synchronize QQ Signature to Space Chat", and "Synchronize Space Chat to QQ Signature" will appear. Just remove the check mark in front.