The FB app is not a standard app on the Chinese N9 version.
So I downloaded the 3 FB deb files (libqt, qmf and the meego file) and installed them through the terminal (dpkg...apt-get for the missing libraries...).

As result, I got a red icon with an exclamation mark.
When I try to open the icon, it says that the installation is unusable and asks permission to reinstall original version.
I click on 'reinstall' and my phone says 'unable to trace installation package dependencies'.

Did I miss some steps? Or do I need to change repos? (I did install Skype successfully).

Looking forward to getting some feedback...
Thanks!