Yang-style t'ai chi ch'uan
Wu Chien-ch'uan moved his family to Shanghai in 1928. In 1935, he established the "Chien-ch'uan T'ai Chi Ch'uan Association" (鑑泉太極拳社) on the ninth floor of the Shanghai YMCA to promote and teach t'ai chi ch'uan. What he taught has since become known as Wu-style t'ai chi ch'uan and is one of the five primary styles practised around the world, the others being Chen-style t'ai chi ch'uan, Yang-style t'ai chi ch'uan, Wu (Hao)-style t'ai chi ch'uan and Sun-style t'ai chi ch'uan.