Yang Chengfu
Choy Hok Pang, a disciple of Yang Chengfu, was the first known proponent of tai chi to openly teach in the United States, beginning in 1939. His son and student Choy Kam Man emigrated to San Francisco from Hong Kong in 1949 to teach t‘ai-chi ch‘üan in Chinatown. Choy Kam Man taught until he died in 1994.