(CNN)On Saturday, Hong Kong residents watched paraplegic athlete Lai Chi-wai strap himself to his wheelchair and climb up one of the city's towering glass-paned skyscrapers.
Over more than 10 hours, Lai managed to pull himself up more than 250 meters (about 820 feet), in an effort to raise money for spinal cord patients.
"I was quite scared," Lai said. "Climbing up a mountain, I can hold onto rocks or little holes, but with glass, all I can really rely on is the rope that I'm hanging off."
The event raised $670,639 (5.2 million Hong Kong dollars) in donations.
The 37-year-old climber was left paralyzed from the waist down after a car accident 10 years ago. Before then, he had been crowned Asia champion four times for rock climbing, and at one point had ranked eighth globally.
After his accident, he resumed climbing by attaching his wheelchair to a pulley system and using his upper body strength to haul himself up. Five years ago, he ascended the 495-meter (1,624 feet) high Lion Rock mountain, a local folk culture symbol of Hong Kong's strength and grit.
"Apart from just living, I wondered what drives me? So I began to chase that, knowing that there was a possibility I could climb mountains, even in a wheelchair," Lai said. "In a way, I forgot that I was a disabled person, I could still dream and I could still