Double Tap (2000)
Double Tap (槍王) is a 2000 Hong Kong action-thriller film directed by Bruce Law, and starring Leslie Cheung, Alex Fong, Monica Chan and Ruby Wong. It was hailed as one of Leslie Cheung's most memorable action films since A Better Tomorrow. A follow up film, Triple Tap, directed by Derek Yee was released in 2010 with only Alex Fong reprising his role as Inspector Miu with a new storyline and new cast consisted of Louis Koo and Daniel Wu.
More at Wikipedia.