Watching this video of Wu Nanfang showcasing a few Zhan Zhaung postures I was struck by the similarity of his pratice and that of the Yiquan school.

I had not been aware that Shaolin trained Zhan Zhuang besides the low MaBu that TV and Movies has made them well renowned for. However, seeing Wu Nanfang's Zhuang Gong it made me curious to know more about Shaolin's standing practices.

How extensive is the Shaolin Zhan Zhuang catalogue? I know that Wang Xiangzhai studied Xinyiba from Shi Henglin. Is there good basis for believing the even step standing methods of Yiquan have their roots in Shaolin Kungfu?