Her momentum continued throughout 2011, winning the women's 48-kg category in the 47th Seoul Amateur Boxing Match in February, and by RSC (Referee Stopped Contest) in the 7th National Amateur Boxing Championships in March. Lee Seung-bae, head coach of the Korean national boxing team, said Lee "has a very accurate left punch. She is tall and has long arms, a very good body for boxing," while coach Baek Seung-won said she has "the fire and the perfect physique" to become a professional boxer, but added, "She is a bit old (to turn pro now)." She later won the rookie of the year award for Seoul-based boxers.