 He represented his nation at the Olympic Games in 2004, 2008 and 2012, and has also made four appearances at the World Championships in Athletics (2005, 2007, 2009 and 2011).After a successful career as a youth, he rose to become one of Asia's best middle-distance runners.He was the silver medallist at the 2006 Asian Games and is a three-time Asian Indoor Games medallist.