The Pom Pom series of Hong Kong comedy films is sometimes also included under the banner of "Lucky Stars films", primarily due to the series' sharing the stars, Richard Ng and John Shum. However the pair play official cops, rather than former criminals turned good. Sammo Hung worked as producer on the first three "Pom Pom" films, and as action director on the first two. All four films were released by Hung's production companies, Bo Ho Films and D&B Films. In "Pom Pom" (1984), Hung, along with Charlie Chin and Stanley Fung cameoed as their characters from "My Lucky Stars", which was released the following year. Jackie Chan and Yuen Biao also made cameo appearances (as a motorcycle cop and truck driver respectively), and a number of their Hong Kong action film contemporaries also made appearances, including Deanie Yip, Lam Ching Ying, Philip Chan, Dick Wei and Wu Ma.