Shanghai Grand (1996) on Netflix

Plot summary

Hui Man Keung serves the Taiwan People's League, fighting the Japanese invaders alongside his comrades. Japanese troops ambush their ship and demand the league's list of nationalists; wounded in the gunfight, Hui falls into the water and comes ashore near Shanghai, where Ding Lik finds him. Ding Lik is a young laborer who dreams of running a triad, and he takes Hui home while keeping his revolver. Ding Lik is smitten with Fung Ching Ching, the daughter of the crime lord Fung King Yiu, and buys film tickets for her and her teacher. When the rival triad leader Shorty Chiu tries to abduct her, Ding Lik steps in and beats him, which brings the anger of Chiu's boss, the Axe Gang's Wing, down on him.