The materials we need to prepare are: computer, QQ space.
1. First, we open the QQ space that needs to be set, and click "Rights Management" in the setting icon in the upper right corner.
2. Then we click to open "Comment browsing anti-harassment" in the pop-up window.
Then we can click and select "Only ourselves" in the pop-up window, so that others can't comment and praise your talk.