Si Tianfeng
Si Tianfeng is a Chinese race walker. He represented China at the 2008 Beijing Olympics, finishing 17th. He also competed in the 50 km walk at the Athletics at the 2009 [National Games of China|2009 Chinese National Games] and won the bronze medal. Si set a List of [Asian Games records in athletics|Games record] to take the gold medal in the 50 km walk at the 2010 Asian Games. He was fourth at the 2010 IAAF World [Race Walking Cup|World Race Walking Cup] that year.
He won the Taicang meet on the 2011 IAAF [World Race Walking Challenge|IAAF Race Walking Challenge] in April 2011, but came fourth that was retrospectively upgraded to bronze after the original gold medalist was caught doping at the World Championships in Athletics|World Championships] that year.
At the 2012 Summer Olympics, he won the silver medal in the men's 50 km race walk, in a personal best of 3:37:16. In May 2012, he also won bronze at the World Racing Cup in Saransk retrospectively upgraded to silver medal after the original gold medalist was disqualified for doping.