QQ published a talk about setting up designated friends to see which friends to look at.

1) Publish the talk interface in the QQ space of the mobile phone, click "Permission Settings" and then select "Designated Person Visible". (as shown in the figure below)

2) Click "√" in the friends list to select the visible people, and then click "Finish". At this point, what we say can only be seen by designated people. (as shown in the figure below)

3) How to find out who set it up at that time (below)

First find out what you were visible to some people at that time, and then click Edit.

Then you click "Some friends are visible"

In this item, you can see the people you set to be visible.