I've been active all my life. In 1990 I retired from my firm, I.M. Pei & Partners, and for two years I didn't do much. Then I started to get kind of antsy, so I decided, I'm going to do some more work. And I chose to do work outside the U.S. because I've spent 45 years here and I wanted to learn more about what's happening in the rest of the world.

When I got the opportunity to do the new wing [the Schauhaus] for the German Historical Museum, for instance, I didn't see it as an opportunity for my own ego, to do something so exciting that every architectural publication would want to put it on the cover. I accepted it because I knew it was going to be a very difficult project, and I wasn't sure I could do something exciting there.

I was born in Suzhou, a city not very far from Shanghai. It's a very interesting town - there is a long artist's tradition there, especially during the Ming and Ching dynasties, which produced many, many scholars and painters and so forth. That's where my family lived for 600, 700 years.

Design is something you have to put your hand to.

My projects have typically taken a long time to complete. Buildings might take on average about five to seven years to finish, but in my case it's been longer, because the projects I have accepted within the past 15 years have been mostly government projects, and those involve some politics and funding issues, and approvals and so forth. So they're slower.

Architecture is the very mirror of life.You only have to cast your eyes on buildings to feel the presence of the past, the spirit of a place; they are the reflection of society.

For Kips Bay, I had a wonderful client, William Zeckendorf, who was willing to gamble with me on using concrete and not brick for a high-rise apartment building. That was very innovative at the time.