The 21-year-old joined the Scottish giants in the January transfer window, but Park believes the South Korean youngster could even shine in the English Premier League.
“He could make an impact in England too. I know him. He has ability and talent,” Park said.
“He needs more chances to play. Sometimes he plays, other times he doesn’t. It is quite difficult.
“Once he gets over that, he will show what he has got.”
“He is good at passing. His playing style is like Steven Gerrard. He is tall, he likes to do long passes, he can shoot,” the 29-year-old added.
“I hope he improves a lot and he shows his ability.”