I spend a lot of time talking to journalists.

I'm not nostalgic about the old city. I don't enjoy it that much. It was just a city with one emperor and the rest of them just rats or meaningless people.

Even though everybody who looked at me would call me a Chinese artist, that's the 1980s. New York in the '80s was not so interesting. I think it's quite narrow-minded. There wasn't much encouragement or opportunities for any artist - not just Chinese artists.

My definition of art has always been the same. It is about freedom of expression, a new way of communication. It is never about exhibiting in museums or about hanging it on the wall. Art should live in the heart of the people. Ordinary people should have the same ability to understand art as anybody else. I don’t think art is elite or mysterious. I don’t think anybody can separate art from politics. The intention to separate art from politics is itself a very political intention.

Nationality started as something natural, but we should not be restrained by the old politics that make up these clear lines. It should have its own way of evolving. In some places, it will evolve slower and in others, faster. It's like the mountains, the ocean and the rivers. It has its own geological forms. Societies cannot be flat. But during change, human rights, human dignity and free speech have to be protected. Otherwise, we'll be going backward.

A lot of the time [in the U.S.], I was thinking about how spending time is always questionable or is always the biggest obstacle in my life.

Once you've tasted freedom, it stays in your heart...