[1] She also won a gold medal for the women's individual event at the 2006 Asian Modern Pentathlon Championships in Kaohsiung, Taiwan.

Yun qualified for the 2008 Summer Olympics in Beijing, where she competed as a lone female athlete in the women's modern pentathlon.

During the competition, Yun struggled in the early segments, with poor scores in pistol shooting and a one-touch épée fencing, but managed to attain twenty-fourth-place finishes in freestyle swimming and show jumping.

In the end, Yun finished the event with cross-country running in thirty-third place, for a total score of 4,872 points.

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