What if my QQ talk is forwarded? Is there any way to make the space of the forwarder delete what I wrote?

Hello, you have to ask the person who forwarded what you said to delete it. You can't delete it yourself. If you don't want others to forward your talk, you can set your space to be visible only to yourself in the space settings, so that others can't enter your QQ space, can't see your talk, and won't forward it again.