The raucous Cantonese humor of the early Jacky Chan hit films was overwhelming the Shaw dominance of the HK movie industry. Why not try to make their own version? Lesser known Shaw director Kwei Chih-Hung was called in to attempt to imitate a Golden Harvest cheapie. At this point, Kwei was mainly known for exploitation films like Bamboo House of Dolls, The Bod Squad and Killer Snakes. He later moved on to the black magic genre culminating in the insane Boxer's Omen, his last film.
The plot is a trifle about an obnoxious restaurant delivery boy causing trouble with some local bad guys for the cook who secretly knows kung fu, eventually learning some techniques and finally, with the cook, confronting the bad guys.
Most of the film is taken up by extended comedy sequences with over the top facial expressions and rather lame slapstick. The fight scenes are actually decent with the guy playing the cook (the legendary stuntman Wah Yuen) doing some excellent leg work. Unfortunately what makes a Jacky Chan film work is his exceptional comic acting and there's no-one near his stature in this film.
There are better kung fu comedies out there.