1993 film by Jeffrey Lau

1997 film by Wong Kar-wai

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.

2004 film directed by Wong Kar-Wai

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.

In 208 A.D., in the final days of the Han Dynasty, shrewd Prime Minster Cao convinced the fickle Emperor Han the only way to unite all of China was to declare war on the kingdoms of Xu in the west and East Wu in the south. Thus began a military campaign of unprecedented scale. Left with no other hope for survival, the kingdoms of Xu and East Wu formed an unlikely alliance.

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.