Liu Xiang, the famous Chinese athlete of Men's 110 Meters Hurdles, watches games at Nanjing Olympic Sports Center Stadium in Nanjing, Jiangsu Province, Aug. 23, 2014.

ATHENS - AUGUST 26: Liu Xiang of China competes in the men's 110 metre hurdle semifinal on August 26, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Olympic Stadium in the Sports Complex in Athens, Greece. (Photo by Stu Forster/Getty Images) *** Local Caption *** Liu Xiang

ATHENS - AUGUST 27: Liu Xiang of China competes in the men's 110 metre hurdle final on August 27, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. Liu, who won gold, equalled the world record of 12.91 seconds. (Photo by Mark Dadswell/Getty Images) *** Local Caption *** Liu Xiang

ATHENS - AUGUST 25: Liu Xiang of China competes in the men's 110 metre hurdle event on August 25, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. (Photo by Stu Forster/Getty Images) *** Local Caption *** Liu Xiang

ATHENS - AUGUST 27: Gold medalist Liu Xiang of China celebrates on the podium during the medal ceremony of the men's 110 metre hurdle event on August 27, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. Terrence Trammell of USA came second and Anier Garcia of Cuba came third. (Photo by Donald Miralle/Getty Images) *** Local Caption *** Liu Xiang

Nanjing 2014 - The flag of the Olympics, is escorted by eight famous Chinese athlets, including Ren Cancan, Wu Minxia ,Liu Xiang, Lei Sheng, Wu Jingyu, Wang Liqin, Zhang Xi and Qiu Jian, and passed over to young athlets.

Sydney 2000-GRAVENSTIJN Deborah (NED) 5th and LIU Yuxiang (CHN) 3rd

17 Sep 2000: Legna Verdecia of Cuba won the gold medal, Noriko Narazaki of Japan won the silver medal, Sun Hui Kye of North Korea and Yuxiang liu of China won the bronze medal in the womens 52 kilogram Judo event at the Sydney Convention and ExhibitionCentre in Darling Harbour during the Sydney 2000 Olympic Games in Sydney, Australia. Mandatory Credit: Clive Brunskill/ALLSPORT

ATHENS - AUGUST 24: Xiang Liu of China competes during the men's 110 metre hurdle event on August 24, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. (Photo by Clive Brunskill/Getty Images) *** Local Caption *** Xiang Liu