Question: What was the year for the crime thriller film in which Kamay Lau played a failed hitlady? 

Context articles: Revolver (2005 film)
Overheard (film)
Infernal Affairs III
Saving Mr. Wu
The White Storm
Overheard 2
The Longest Nite
The Tragic Fantasy - Tiger of Wanchai
The Tigers (film)
Kamay Lau

Revolver is a 2005 British-French crime thriller film co-written and directed by Guy Ritchie and starring Jason Statham, Ray Liotta, Vincent Pastore and André Benjamin.
 The film centres on a revenge-seeking confidence trickster whose weapon is a universal formula that guarantees victory to its user, when applied to any game or confidence trick.
Overheard () is a 2009 Hong Kong crime thriller film written and directed by Alan Mak and Felix Chong, and produced by Henry Fong and Derek Yee.
 The film stars Lau Ching-wan, Louis Koo and Daniel Wu as a trio of police officers conducting surveillance on a public company.
 The film was released theatrically in Hong Kong on 30 July 2009.
 The sequel, "Overheard 2", was released in 2011.
Infernal Affairs III is a 2003 Hong Kong crime thriller film directed by Andrew Lau and Alan Mak.
 It is the third and final installment in the "Infernal Affairs" film series, and is both a sequel and a semi-prequel to the original film, as it intercuts events before and after the events in the first film.
 Andy Lau, Tony Leung, Kelly Chen, Anthony Wong, Eric Tsang, and Chapman To reprise their roles again, joined by new cast members Leon Lai and Chen Daoming.
Saving Mr. Wu, (), previously known as The Strongest Competitor (), is a 2015 Chinese action crime thriller film directed by Ding Sheng and starring Andy Lau, Liu Ye, Wu Ruofu and Wang Qianyuan.
 The film was based on a true abduction case where cast member Wu Ruofu was the victim.
The White Storm, formerly known as The Cartel War (Chinese: 掃毒) is a 2013 Hong Kong-Chinese crime thriller film directed by Benny Chan and starring Sean Lau, Louis Koo, and Nick Cheung.
 The film had its world premiere at the 2013 Hong Kong Asian Film Festival on 25 October 2013.
Overheard 2 is a 2011 Hong Kong crime thriller film produced by Derek Yee, written and directed by Alan Mak and Felix Chong and starring Louis Koo, Lau Ching-wan and Daniel Wu.
 It is a sequel to the 2009 film "Overheard" where Koo, Lau and Wu play different roles with a different storyline, but the key elements of the first film are kept.
 Another sequel, "Overheard 3" was released on 30 May 2014.
The Longest Nite (, Literal Title: "Dark Flowers") is a 1998 Hong Kong crime thriller film directed by Patrick Yau and Johnnie To, starring Lau Ching-wan and Tony Leung Chiu-wai.
 The film was produced by To and Wai Ka-fai along with their production company, Milkyway Image.
The Tragic Fantasy - Tiger of Wanchai is a 1994 Hong Kong action crime thriller film directed by Stephen Lo and Joe Chu and starring Simon Yam, Lau Ching-wan, Wan Yeung-ming and Roy Cheung.
 The film is based on the life of Sun Yee On triad member (portrayed in the film by Yam), nicknamed the "Tiger of Wan Chai", whom was murdered in Macau in November 1993.
The Tigers is a 1991 Hong Kong action crime thriller film directed by Eric Tsang, and starring Andy Lau, Tony Leung, Felix Wong, Michael Miu and Kent Tong, who were the Five Tiger Generals of TVB in the 1980s.
 It is a film adaptation of the 1984 TVB serial, "Rise and Fall of a Stand-In" which featured the film's stars Miu and Tong.
Kamay Lau is a British actress, best known as the failed hitlady in "Revolver".