Yang Chengfu
Cheng rejected the appellation "Yang-style Short Form" to characterize his t'ai chi. When pressed on the issue, he called his form "Yang-style t'ai chi in 37 Postures." However, the postures in his form are counted differently from those in the Yang Chengfu form. In the older form each movement counts as a posture, whereas in the Cheng form postures are counted only the first time they are performed, and rarely or not at all when they are repeated. These differences in how the postures are counted have led some Cheng practitioners, such as William C. C. Chen, to characterize their own forms as exceeding 70 "movements," and indeed, upon close comparison with the Yang Chengfu form, Cheng's postures, if counted the same way as Yang's are, would number over 70. Moreover, there is nothing in Cheng's teaching to prohibit a practitioner of his style from repeating any number of movements just as many or more times than they are repeated in the Yang Chengfu form.