N'afọ 2006, o nwetara ihe nrite ọlaedo mbụ ya na mba ụwa na asọmpi iko mba ụwa nke 18 nke mahadum na Judo na Suwon, South Korea. Jeong nwetakwara ọla nchara n'asọmpị -78 kg na 2007 World Judo Championships
, otu ọlaọcha na otu ibu na 2007 Asian Judo Championships, na ọla nchara na 2008 Summer Olympics.