What should I do if I don't want my good friends to see it when QQ is released?

You can block friends or make them invisible.

1. Open the QQ space, click the gear shape setting key in the upper right corner, and select permission setting (as shown in the figure).

2. Enter the permission settings. Click the custom interface to add people you don't want to see to the restricted list (as shown below).

This function is to restrict others from entering QQ space, which means that you don't want someone to see the dynamics and this person can't enter QQ space at the same time.