2001 film by Stanley Kwan

It's the 1940s, and the notorious Axe Gang terrorizes Shanghai. Small-time criminals Sing and Bone hope to join, but they only manage to make lots of very dangerous enemies. Fortunately for them, kung fu masters and hidden strength can be found in unlikely places. Now they just have to take on the entire Axe Gang.

2006 Hong Kong film directed by Patrick Tam

Two neighbors form a strong bond after both suspect extramarital activities of their spouses. However, they agree to keep their bond platonic so as not to commit similar wrongs.

2006 film by Benny Chan

1993 film by Lee Lik-chi

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

Two melancholic Hong Kong policemen fall in love: one with a mysterious underworld figure, the other with a beautiful and ethereal server at a late-night restaurant.