She began competing in the longer road running events at a comparatively young age and was third in the Seoul Half Marathon in 2001 – her time of 1:17:51 was among the fastest by a junior that year.

[2] She earned a spot on the South Korean team for the 2002 Asian Games in Busan and ran a career best of 32:46.54 for the 10,000 metres, finishing in fifth place.

[5] At the 2004 Athens Olympics, she finished in 23rd place, the second South Korea past the line after her compatriot Lee Eun-jung.

[8] A return to Gyeongju in 2010 marked her re-establishment among the elite as she ran her second fastest ever time (2:32:09) to win her first marathon in six years, finishing some sixteen minutes ahead of the field.

[10] Chung represented her country on home turf at the 2011 World Championships in Athletics held in Daegu and placed 35th in the women's marathon race.