Required materials: PC version of QQ.
First, open the computer version of QQ, click "3" in the lower left corner, and click "Settings" in the pop-up options.
2. After opening the QQ Settings window, click "Permission Settings" at the top.
3. After opening permission settings, click "Permission Settings" under personal information.
4. Finally, click the arrow to the right of "Birthday/Constellation" and click "Visible only to yourself" in the drop-down menu to hide it.