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.

I call on people to be 'obsessed citizens,' forever questioning and asking for accountability. That's the only chance we have today of a healthy and happy life.

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.

Ai Weiwei Quotes