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.
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.
Movie debut of Japanese bodybuilder and martial artist Michiko Nishiwaki.
During a break in filming in Japan, Jackie Chan was actually chased down by a mob of fans who recognized him. The mob almost caused Chan's death when one of them grabbed a hold of his scarf and nearly strangled him as he ran away.