James Wong

Chow Si-Pak, Dried Pork, Lo Ka-Ying and Yo are cousins who are unemployed. Later, they get jobs at Ken Lau's car garage. Lau's rival, Bluffer Wong, has a competing business that employs young girls as the mechanics. (imdb)

A young man wants to be a Hong Kong police officer but is too short to qualify. However, he doesn't let that stop him: he goes around impersonating an officer, investigating crimes, and busting criminals. One day, he interrupts a bank robbery (by three men in drag), gets shot in the process, and dies. When the case is assigned to a female investigator, he returns as a ghost to lend a hand at solving the robbery.