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. There she came 28th in the championship marathon, Korea's best performer from their five-woman team. 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. A fourth-place finish in 2:29:53 hours at the 2012 Seoul International Marathon earned her a spot on the Olympic marathon team. At the 2012 London Olympics she placed 96th in the Olympic marathon with a time of 2:46:38.