Graduated from Dankook University w/ a degree in physical education (2012).
2004, 2008, 2012 & 2016 Olympian.
2006 Asian Games: 200 m freestyle gold, 4×200 m freestyle bronze, 400 m freestyle gold, 4×100 m freestyle bronze, 100 m freestyle silver, 1500 m freestyle gold & 4×100 m medley bronze.
2007: 400 m freestyle gold & 200 m freestyle bronze.
2008 Olympics: 400 m freestyle gold & 200 m freestyle silver.
2010 Asian Games: 4×200 m freestyle bronze, 400 m freestyle gold, 4×100 m freestyle bronze, 100 m freestyle gold, 200 m freestyle gold, 1500 m freestyle silver & 4×100 m medley silver.
2011 worlds: 400 m freestyle gold.
2012 Olympics: 400 m freestyle & 200 m freestyle silver.