One day, people will be able to buy tickets to visit space.
I loved flying as much as I thought I would and continue to fly aircraft.
There were different challenges along the way. Certainly the food shortage was unpleasant.
The most interesting thing was looking out the window and taking photographs of different places on Earth.
Of course, you'll have to meet the physical and psychological demands. A space walk takes a lot of energy.
Tinkering is something we need to know how to do in order to keep something like the space station running. I am a tinkerer by nature.
Our task was doing maintenance and repairs to keep the station in a good state for the return of the shuttle flights and resumption of major ISS construction.
One of my challenges was to try to photograph the Great Wall of China. And I did actually take some photos, but it was hard to discern the wall with the naked eye.
But a lot of that kind of work is done pre-flight, coordinating efforts with the flight directors and the ground teams, and figuring out how you're going to operate together.
I hope that China will continue with space exploration. It would be logical to have international co-operation. I hope that it will come about and that I can be involved in it.