Hak-myong·Sung is a professional footballer from PRK and is currently 20 years old. At international level, he features for Korea DPR U20. His main role on the pitch is Defender. He measures 180cm in height and weighs 66kg.

Across the AFC U20 Asian Cup 2024-2025, Hak-myong·Sung appeared in 3 matches and averaged 1 tackles, 1.7 interceptions, 8 clearances, and 0 blocked shots per game.