Despite being billed as one of the stars, Jackie Chan's role in this movie is relatively minor until the final half hour. The major star of the movie is Chan's longtime associate and former member of the Peking Opera School, Sammo Kam-Bo Hung. This movie also features another of that troupe, Biao Yuen.
First movie to ever cross the Hong Kong thirty million dollar mark at the Hong Kong box-office.
Movie debut of Japanese bodybuilder and martial artist Michiko Nishiwaki.
Michiko Nishiwaki said that the hardest thing for her to do in the film was her fall after she is knocked out by a single punch from Sammo Hung. Since she had to fall comically backward completely straight and stiff she had no way to cushion parts of her body, especially her head, from the fall.
John Sham ("Curly" in Winners & Sinners (1981) was notably absent from the gang in this movie, due to his commitments as a political activist. He was replaced in this movie by Eric Tsang.