Line Walker (2016) aka Shi tu xing zhe - Nick Cheung, Louis Koo, Francis Ng

Line Walker (2016) aka Shi tu xing zhe
Action, Thriller
Several cops went undercover. Due to some issues, all undercover identities were wiped clean from the police database.
Director: Jazz Boon
Writer: Cat Kwan
Stars: Nick Cheung, Louis Koo, Francis Ng