1. Open your QQ space.

2. Then click Personal File in the navigation bar.

3. There are two columns on the left with personal profile and data completion. Click the first option in the Profile (My Data) column.

The first page is the most basic and important. If you don't want to change it, just click "Fill in the next page" below.

The second page seems to be your hobby. If not, click "Fill in the next page" below.

6. Now is the third and last page, where you can modify your signature file. There are three places on this page that can be modified. QQ space name, QQ space description, signature file and signature file are at the bottom.

I hope my answer can help you.