Just download MeituXiuXiu on your computer.
1. Download MeituXiuXiu on your computer.
2. Click on the beautiful picture to show off.
3. Click "Beautify Picture".
4. Click "Open a picture" and select the calligraphy picture saved on your computer.
5. Click "Basics".
6. Click "Invert Color".
7. Click "Save" and it's OK.