School on Fire

School on Fire is a 1988 Hong Kong action film directed by Ringo Lam. The film involves a young schoolgirl Chu Yuen Fong Fennie Yuen who becomes caught in a tragic stranglehold of triad activity after she testifies over a triad beating. When this news reaches the triad leader Brother Smart Roy Cheung, Yuen Fong must pay him protection money for what she has done as events begin to escalate.

Source: Wikipedia