BBC News - Chinese websites 'defaced in Anonymous attack'
The Anonymous hacking group claims to have defaced almost 500 websites in China.
Targets hit in the mass defacement included government sites, its official agencies, trade groups and many others.
A message put on the hacked sites said the attack was carried out to protest against the Chinese government's strict control of its citizens.
It urged Chinese people to join Anonymous and stage their own protests against the regime.