John Sham Kin-Fun, commonly known as John Shum, is a Hong Kong actor, film producer, and political activist. He is best known for his contributions to the Hong Kong New Wave.

Yes, Madam is a 1985 Hong Kong action film directed by Corey Yuen, and produced by Sammo Hung, who also appears in a cameo in the film. The film stars Michelle Yeoh as Senior Inspector Ng who teams up