"Police in China can do whatever they want; after 81 days in arbitrary detention you clearly realise ..." — Ai Weiwei

Now the British are coming. I think Cameron should ask the Chinese government not to make people 'disappear' or to jail them merely because they have different opinions.

Since the global economic crisis began, the change in global attitudes is clear to see - and I think it is pitiful. Barack Obama came to China and he is probably the only president of the United States never to mention the words 'human rights' in public.

We see the tendency in the world to criticise democracy and sometimes even to say that authoritarian countries like China are more efficient. That is very short-sighted. China looks efficient only because it can sacrifice most people's rights. This is not something the west should be happy about.

When you have strict censorship of the internet, young students cannot receive a full education. Their view of the world is imbalanced. There can be no true discussion of the issues.