Tulis hiji continuation for this paragraph - Asalna bantamweight (di handapeun 63 kg), Lee samentara turun dina beurat ka flyweight (di handapeun 58 kg) sanggeus 2011 Dunya Championships
dina raraga bersaing dina Olimpiade 2012, dimana ngan aya opat kelas beurat. Lee nyieun debut internasionalna dina kelas laleur dina 2011 World Taekwondo Olympic Qualification Tournament di Baku, Azerbaijan dimana anjeunna ngalaman kekalahan internasional kahijina ka 2008 Olympic silver medalist Gabriel Mercedes 14<unk>12 di semifinal. Dina Méi 2012, kumaha oge, anjeunna nyekel medali emas flyweight kahijina di 2012 Asian Taekwondo Championships, ngéléhkeun juara flyweight Asia Pen-Ek Karaket 8<unk>4 dina pertandingan final. Dina Olimpiade Usum Panas 2016, Lee meunang medali perunggu, ngéléhkeun Jaouad Achab ti Bélgia 11<unk>7. Dina 2016 WTF World Taekwondo Grand-Prix, Lee meunang emas ngalawan Konstantin Minin.