The use of "frames" was an attempt by scholars in the late 1930s to classify the growing number of taijiquan styles by size of stance and other criteria. and this became a common practice by the 1950s. They classified, two well-known traditions, Chen Fake's taijiquan as Large Frame and Wu Yuxiang's as Small Frame. So, the Chen Small Frame (Xiaojia) tradition got its name partly by "de facto" being different from publicly known Chen forms. And partly because Chen Qingping was one of Wu Yuxiang's teachers, so his lineage too must be small frame. To relieve confusion for the new students, the Chen Family divided their Taijiquan into Large Frame (大架, Dà jià ) and Small Frame (小架, Xiǎo jià), and other historical changes were all but forgotten.