After retiring, I was a little bored with nothing to do and got fat. I thought, if a 60-year-old metabolic fat man, after five years, can get to Mount Everest, that would be very exciting.
I never imagined I could make it to the top of Mount Everest at age 80. This is the world's best feeling, although I'm totally exhausted. Even at 80, I can still do quite well.