looks like China isn't the only one who block sites on the net as I thought...
however their gov. are still slightly better than ours as ours has not only banned porn site, but also banned quite a lot of useful sites like geocities.com. the site of Free Software Foundation France (
http://www.fsffrance.org) is also in their blacklist and non-accessable here (I know little french so I can't understand why they blocked it
)
PS, here is a good site which allows you circumance site blocking...
http://anonymouse.ws
and if they uses packet filtering...
https://www.the-cloak.com 