There's a few *old* filmclips of him on Youtube or somewhere. He was one of the very good Chinese martial artists who made it to Taiwan with Chiang Kai Shek during the Communist Revolution. Specialized in the "internal martial arts" and from what I've seen in his clips, he was extremely powerful (although I've been told that there were less public CMA's on Taiwan who were better; one of them apparently tossed Wang XuJin up onto a table in a friendly encounter).
Wang stressed standing exercises, etc., but from what I've been able to see, I suspect he never really told people how to do them... which is typical for the Chinese.
Ellis is sort of a font of Wang XuJin anecdotes. Maybe he can contribute other thoughts.