It's my goal to make a building as immaterial as possible. Architecture is a very material thing. It takes a lot of resources so why not eliminate what you don't need as long as you're able to achieve the same result?
I see the Beijing National Stadium as an architectural project. I accepted Herzog and De Meuron's invitation to collaborate on the design and our proposal won the competition. From beginning to end I stayed with the project. I am committed to fostering relationships between a city and its architecture.
Liquid architecture. It's like jazz - you improvise you work together you play off each other you make something they make something. And I think it's a way of - for me it's a way of trying to understand the city and what might happen in the city.