Original: Her coach at the time, Jong-Hyeon Ryu, strongly suggested to Kim's mother that Kim should continue to skate, predicting that she would become a world-class figure skater in the future.
Simplified: At that time, her coach, Ryu Jong-Hyeon, approved of Kim's talent. Because of this, he asked Kim's mother that Kim should continue to learn how to skate, saying that she would become a wonderful figure skater in the future.