Chen Penbin is a 38-year-old endurance running athlete and extreme marathon runner from Taizhou, East China's Zhejiang province, and is perhaps China's most famous marathon runner.
Chinese internet entrepreneur Pan Haidong can't be accused of being a shrinking violet.
It's a serious challenge for a fully able-bodied person to finish a marathon. Doing it on one leg goes beyond the remarkable and enters the realm of amazing.
Hu Jinnan's passion for running international marathons has taken him around the world. From New York City to Tokyo, he's crossed the finish line in a dozen such events.