Yang-style t'ai chi ch'uan
The Mongolian quan fa master who taught Yoon chinese martial arts remains unknown. His name has never been specified by Yoon nor any of his associates. It is speculated that the style this Mongolian martial artist taught to Yoon was either Changquan and/or Yang-style t'ai chi ch'uan. It is known that early Chuan-fa forms from the YMCA Kwon Bop Bu included Dan Kwon (Duan Quan), Chang Kwon (Changquan), Tai Jo Kwon (Taizuquan), Pal Gi Kwon (Bajiquan), and Doju San (토조산, Escaping Mist) and others.