China's Su Bingtian celebrates with teammate Zhang Peimeng after reaching the men's 4 x 100 meters relay final at the 15th IAAF Championships at the National Stadium in Beijing, Aug 29, 2015. (Photo/Xinhua)
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China's Su Bingtian celebrates with teammate Zhang Peimeng after reaching the men's 4 x 100 meters relay final at the 15th IAAF Championships at the National Stadium in Beijing, Aug 29, 2015. (Photo/Xinhua)