Yang Chengfu
Cheng's changes to the Yang-style form have never been officially recognised by the Yang family and (perhaps partly because of the continued popularity of Cheng's shortened form) his style is still a source of controversy among some t'ai chi ch'uan practitioners. From Cheng's own point of view, the approval of his elder brother disciple Ch'en Wei-ming was all the recognition he needed, since by that time Yang Chengfu was deceased, and all of the current generation of Yang Chengfu leaders were junior to him.