The Queen of Gamble(1991)

Mainlander Nan moves to Hong Kong to earn a living by being a gambler and casino dealer. She meets up with her stuntman cousin Po and his horse-race gambler landlord Li and together, the three try to make ends meet in the gambling world. However, they stumbled upon a plot where greedy investor Fu Hon-San swindled the shares of his gambler brother Fun Hon-Hwa, whom befriended Nan, and, as a result, the gamblers band together in attempts to topple Hon-San.