Mobile QQ can't set the hidden location and age constellation, only computer QQ can set it. The specific operation steps are as follows:
1. First open QQ and click the "three" icon option in the lower left corner.
2. Then click the "Settings" option in the new pop-up page.
3. Then click the "Permission Settings" option in the new pop-up page.
4. Then click the "Permission Settings" option under the profile in the newly popped-up page.
5. Finally, on this page, click "Location and Birthday/Constellation" and set it to "Visible only to yourself" to hide the location and age constellation.