David Yang, a native of Qingyang City, Gansu Province, holds a master's degree in cultural anthropology in Peking University, and is the founder and secretary general of Xizang Autonomous Region Wushu Association. He has profound attainments in Wushu theory and unique views on the role of Wushu in culture and society.
Zhao Youbin, a native of Xi, Shaanxi, a China martial artist, is the fifth generation descendant of Yang-style Tai Ji Chuan, and the eighth paragraph of China Wushu. He has profound attainments in Tai Ji Chuan, and actively promoted Tai Ji Chuan in Xi, making great contributions.
Generally speaking, the two martial artists have profound attainments in theory and practice, and their expertise and contributions cannot be directly compared.