Do Tak-Chi

Running Mate is a Hong Kong Comedy directed by Stanley Ko Moon-Kai and starring Alex Man.

When Hsiang Ming's wife is murdered, he takes up the hunt for her killer. The killer turns out to not be at all like he imagined, and suddenly he has unsuspected enemies who are after him.

Lin is a plain-clothes cop in the crime-riddled district of Mongkok who bungles a vice operation directed at mainland prostitues. He falls for a ditsy hooker who tells him the love of her life is a killer who once svaed her life in a shootout.