"洪洞通臂" Hong Dong Tong Bei & Shaolin

[Sal Canzonieri]

Does anyone have any information about "洪洞通臂" Hong Dong Tong Bei from Shanxi province?

(Hong Dong is the Shanxi city where the Chen family originates from by the way)

I am looking for as much info as possible about the style.
When was it created?

What is it's relationship to Tong Bei Quan?

I understand that Hong Dong Tong Bei is simply called Long Fist there, or Wuji Coiling Boxing.

Also I have heard conjecture that Shaolin Hong Quan originated in Shanxi (arriving at Shaolin via Bai Yu Feng and Li Sou) and thus maybe derived from Hong Dong Tong Bei.
Anyone read anything about this?

Shanxi province also has the Hong Quan style that is known as Red Fist, which is different from the Flowing (or Flood) Fist Hong Quan.
Does anyone have any information about this other Hong Quan as well?