Cheng's changes to the Yang-style form were not 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 Chen Weiming 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.
