Liu Jiafu, 65, plays with iron and hula hoops, which weigh about 5 kilograms, at Longtan Lake Park in Beijing, June 6, 2011. He said the exercise helps him move every part of his body and keeps him healthy. [Photo/CFP]
A girl watches as 65-year-old Liu Jiafu plays with iron and hula hoops, which weigh about 5 kilograms, at Longtan Lake Park in Beijing, June 6, 2011. [Photo/CFP]