One of Ho Chung Tao's (Bruce Li) favorite films of his own filmography.
The photo of Chen Zhen at his funeral in the opening of the film is actually a behind the scenes photo of Bruce Lee during the filming of Way of the Dragon.
While this film brings back Li Kun and Tien Feng to reprise their roles from the first Fist of Fury, Nora Miao passed on this film to reprise her role in the "official" Fist of Fury sequel, New Fist of Fury. Thus, an uncredited actress was brought it to play Miao's character of Yuan Li-erh in the opening funeral sequence.
One of two unofficial sequels to Bruce Lee films to feature Lo Lieh. The other is The Big Boss Part II, where Lieh took on the lead role..
It is rumored that Lo Wei wanted to call his Fist of Fury sequel "Fist of Fury Part II"/"Jing Wu Men Xu Ji" first, but this film beat him to it. Thus, his hand was forced to call his sequel "New Fist of Fury"/"Xin Jing Wu Men".