Subdivisions in Chen taijiquan are a fairly recent development. Prior to 1958, there were differences in the way teachers of different lineages taught, but there were no formal subdivisions or frames. Despite neat, discrete lineage charts, there are a number of students known to have trained with multiple teachers often without regard to lineage. Chen Zhaopei, as just one example, studied with his father, Chen Dengke, his father's uncle, Chen Yanxi, and Yanxi's son, Chen Fake, all now considered Dajia practitioners, but he also studied theory with Chen Xin, now considered a Xiaojia practitioner.