DR. Mark Cheng – K3 Combat Systems – Ep22
Dr. Mark Cheng is the creator of K3 Combat Systems. He is an author and a contributing editor for Black Belt Magazine. Mark has been involved in numerous martial arts for most of his life. I hope you enjoy his story. Learn more about Mark on his website. Homepage – Dr Mark Cheng – Move … DR. Mark Cheng – K3 Combat Systems – Ep22