Taiwanese pop
Aside from his filmmaking career, On is also a singer. He has released some tracks, including a duet with Taiwanese pop singer Jolin Tsai called "Angel of Love". His hobbies are martial arts and video games. He continues to train in Wing Chun Kung Fu with good friend, actor, and martial artist Philip Ng, and has studied Thai boxing under former world kickboxing champion and actor Billy Chau in preparation for "Star Runner".