[1] She represented her country at the 2012 Summer Olympics and the 2011 World Championships in Athletics.

She started out doing middle- and long-distance track as a teenager and broke the South Korean indoor record for the 3000 metres at the 2005 Asian Indoor Games, taking the silver medal behind India's O. P.

[3] She ran in both the 3000 m and 5000 m at the 2008 World Junior Championships in Athletics and finished 15th and tenth, respectively.

[5] Her marathon performances were enough to gain a place on the team for the 2011 World Championships in Athletics, which was hosted on home soil in Daegu.

[7] She ended the year with a 10,000 metres win at the Korean National Sports Festival, setting a personal best of 33:46.61 minutes.