Huang Tonxi says the stroke he suffered 22 years ago left half his
body paralyzed. Today the 72-year-old moves almost like a ballet dancer
as he practices tai chi ball, a variation of the ancient Chinese form of self-defense, tai chi. Huang moves in circles practicing the routines he claims helped him regain mobility after his illness. His eyes, as in a trance, follow the ball that dances on the racquet. He sustains the movements for more than 15 minutes, at times slowing down only to execute yet another swirling circle.