Chen Style Taijiquan and Xin Yi Ba 心意把

We all know that the various styles of taiji developed from Chen style taiji. However, from where did Chen style taiji develop from?

Matsuda Ryuchi 松田隆智 has his own theory about the development of taijiquan. He sees a connection between Chen style taiji, and Shaolin's Xin Yi Ba 心意把.

As you can see, figures 3 and 4 are similar to Chen style's 金刚捣堆, if not the same. Yet it is not in other styles of taiji, such as Yang and Sun styles. Why? Could it be that this move was only added into Chen style after Yang style was borned?