Why doesn't qq personalized signature appear in the chat box?

Open QQ, click Settings in the lower left corner, select Privacy, turn off personalized signature synchronization, and have a chat. The steps are as follows:

First, click Settings.

Open QQ and click Settings in the lower left corner.

Second, click Privacy.

In the settings interface, click Privacy to enter.

Third, click Close Synchronization.

Choose to turn off personalized signature synchronization.