導火線

The name of this movie is 導火線 released in 2007-07-26 and it's main theme is Detective Sergeant Ma Jun, known for dispensing his own brand of justice during arrests, teams up with an undercover cop, Wilson, to try and bring down three merciless Vietnamese brothers running a smuggling ring in the months before mainland China's takeover of Hong Kong. Jun pursues the gang tirelessly, sometimes ignoring police protocols. A showdown is inevitable.