 Both schools successfully explain why the taijiquan that Yang Luchan's descendants now practice is substantially different from the modern Chen routines, but neither theory can be completely substantiated and thus much controversy remains.At the same time, the members of the Chen clan believe that not much changed in Chen Taijiquan from the times preceding Chen Changxing, nor after him besides, perhaps, the sequence of the movements and their grouping in to the forms.The differences between Chen Taijiquan and other big styles are mostly attributed to the independent development of non-Chen styles in the modern and pre-modern eras.