Lengkepan kalimah di handap ieu: Heo ngawakilan Koréa Kidul di 2012 FIBA Under-17 World Championship, dimana anjeunna rata-rata 17.7 poin, 2 rebound sareng 2.9 assists. Heo ogé milu dina
2013 FIBA Under-19 World Championship, di mana anjeunna rata-rata 12,8 poin, 3,4 rebound sareng 3,2 assists.