I have space to say why others can still see it after deletion.

Due to incorrect operation, the solution and detailed operation steps are as follows:

1. Users first find the mobile version of QQ on their mobile phones, click Open, find the QQ avatar and click it, as shown in the figure below, and proceed to the next step.

2. Secondly, after completing the above operations, the user will open a list and see some QQ-related functions. Find the "Settings" button in the lower left corner of the open interface, click Open, as shown in the figure below, and then proceed to the next step.

3. After the above operations, find the option of "Contact, Privacy" in the open interface, click Open, as shown in the figure below, and then go to the next step.

4. Then, after performing the above operations, the user finds "DynamicpermissionSettings" and clicks Open, as shown in the figure below, to enter the next step.

5. Then, after completing the above operations, the user should find the "sealspacecontent" option, click Enter, as shown in the figure below, and then go to the next step.

6. Finally, through the above operations, the user can set the "seal date", that is. "Three days before half a year" option, and you can also set the date. This file will contain space waiting for the discussion date, as shown in the figure below. In this way, the problem is solved.