Chinese hurdler Liu Xiang competes in the semifinal of Men's 110-meter hurdles during the China Athletics Open at the National Stadium, or the Bird's Nest, in Beijing on Friday, May 23, 2008. The world record holder clocked 13.46 seconds and is on his way to the final, which will be held Saturday night.

Chinese hurdler Liu Xiang (L) competes in the semifinal of Men's 110-meter hurdles during the China Athletics Open at the National Stadium, or the Bird's Nest, in Beijing on Friday, May 23, 2008. The world record holder clocked 13.46 seconds and is on his way to the final, which will be held Saturday night.

Chinese hurdler Liu Xiang (2nd from L) competes in the semifinal of Men's 110-meter hurdles during the China Athletics Open at the National Stadium, or the Bird's Nest, in Beijing on Friday, May 23, 2008. The world record holder clocked 13.46 seconds and is on his way to the final, which will be held Saturday night.

Chinese hurdler Liu Xiang (L) competes in the semifinal of Men's 110-meter hurdles during the China Athletics Open at the National Stadium, or the Bird's Nest, in Beijing on Friday, May 23, 2008. The world record holder clocked 13.46 seconds and is on his way to the final, which will be held Saturday night.