The original title of the form is called Iron fist. It is subsumed under Li Kunshan's Longfist manuscript.
Zhang Fuchen Is my elder. He studied with Shr Zheng zhong for about 7 years. And left int he early 90's. He was still there at the time I moved into the backroom of the school which was in 1991.

Here are two articles I have written on this form.

http://www.plumflowermantisboxing.co...ron%20Fist.htm

http://www.plumflowermantisboxing.co...ng%20elbow.htm

Kevin