Takes Two to Mingle(1990)

Name: Takes Two to Mingle
Released: 1990
Cast: Danny Lee Sau-Yin, Wu Ma, Fennie Yuen Kit-Ying, David Lam Wai, Lam King-Kong

★ 8.5 TMDB

A tough-as-nail-cop becomes irrate when he learns that his sister is dating the son of a powerful triad leader.