The Glee star revealed that he doesn't like to show off his dance moves in public.
"I'm actually really shy," Shum told GQ. "I'd rather dance in a corner than dance in a circle."
Shum went on to say that he is happy that his role on the Fox series has continued to grow.
"It's been like a year and a half since anybody's referred to me as 'the other Asian'," Shum said.
Shum recently promised that his character Mike will have an ongoing storyline this season on Glee.
In August, he revealed that he hopes to sing on the third season of the musical show.
Glee airs on Tuesdays at 8/7c on Fox in the US and on Thursdays at 9pm on Sky1 in the UK.
Watch Harry Shum and Jenna Ushkowitz talk to Digital Spy about Glee below: