Soldier of Fortune (1955)
Soldier of Fortune starring Clark Gable and Susan Hayward is a story about a woman (Hayward) who comes to Hong Kong to look for her missing husband. She ends up reluctantly accepting the help of a local businessman-cum-crook (Gable) to rescue her husband from the clutches of the Communist Chinese on the Mainland.
The film was released the same year as "Love is a Many Splendored Thing" - 1955 - and contains a lot of footage of Hong Kong at that time including some of the Peak Tram. I mention the peak tram specifically because Martin Booth makes a mention of these scenes in his memoir "Golden Boy" (aka Gwei Lo).
Incidentally, Susan hayward filmed all of her scenes back in the studio in California due to an ongoing custody battle with her former husband. She couldn't risk leaving the country and so a stand in was employed for any HK-based scene involving her.