I think Chinese leadership is trying to tell the world they have another set of logic or reasoning or values which are different from yours. Of course, I don't think they believe that. It's just an argument that's made when you can't confront the truth and facts. They really want to maintain power.

I'm always followed by two or three cars and have police around. Even walking in the park, you see them taking photos behind the bushes and trying to videotape everything.

If we all say the same thing, then I think the government has to listen. But because no one is saying it, I become singled out, even though what I'm saying is common sense. It's very essential values that we all have to protect. But in Chinese society, people are giving up on protecting these values.

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.

People are always wondering if I am an artist or political activist or politician. Maybe I'll just clearly tell you: Whatever I do is not art. Let's say it is just objects or materials, movies or writing, but not art, OK?

Police in China can do whatever they want; after 81 days in arbitrary detention you clearly realise that they don't have to obey their own laws. In a society like this there is no negotiation, no discussion, except to tell you that power can crush you any time they want - not only you, your whole family and all people like you.

Recently I danced in a video spoof of the song 'Gangnam Style,' and it was quickly banned across multiple Chinese online video platforms. But the story still traveled all over the world, carried in hundreds of international media reports.

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.

So maybe there are three parts in my life - earlier background living in exile in Xinjiang in a very political circumstance, then later the United States from 24 to 36 years old. I was quite equipped with liberal thinking. Then the Internet. If there is no Internet, of course, I cannot really exercise my opinion or my ideas.

The 'Bird's Nest' National Stadium, which I helped to conceive, is designed to embody the Olympic spirit of 'fair competition.' It tells people that freedom is possible but needs fairness, courage and strength.

The Beijing Olympics and the Shanghai World Expo show just how much effort China is willing to spend to enter the global stage. But while China desires to understand the world, it fails to accept its universal values.

The Chinese art world does not exist. In a society that restricts individual freedoms and violates human rights, anything that calls itself creative or independent is a pretence. It is impossible for a totalitarian society to create anything with passion and imagination.

The Olympic Games are highly commercialised. They purport to follow the traditions of an ancient athletics competition, but today it is the commercial aspect that is most apparent. I have seen how, through sport, cities and corporations compete against each other for financial gain.

This nation is notorious for its ability to make or fake anything cheaply. 'Made-in-China' goods now fill homes around the world. But our giant country has a small problem. We can't manufacture the happiness of our people.

This week, the world gathers in Beijing for the 2008 Olympic games. This is the extraordinary moment China has been dreaming of for 100 years. People have been longing for this moment, because it symbolises a turning point in China's relationship with the outside world.

To protect the right of expression is the central part of an artist's activity... In China many essential rights are lacking, and I wanted to remind people of this.

To survive, China had to open up to the West. It could not survive otherwise. This was after many millions have died of hunger in a country that was like North Korea is today. Once we became part of global competition, we had to agree to some rules. It's painful, but we had to. Otherwise there was no way to survive.

Twitter was like a poem. It was rich, real and spontaneous. It really fit my style. In a year and a half, I tweeted 60,000 tweets, over 100,000 words. I spent a minimum eight hours a day on it, sometimes 24 hours.

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.