Question: William Kong co-produced a Hong Kong/Chinese historical drama war film in what year?
Context: The Flowers of War () is a 2011 Hong Kong/Chinese historical drama war film directed by Zhang Yimou, starring Christian Bale, Ni Ni, Zhang Xinyi, Tong Dawei, Atsuro Watabe, Shigeo Kobayashi and Cao Kefan.  The film is based on a novella by Geling Yan, "13 Flowers of Nanjing", inspired by the diary of Minnie Vautrin.  The story is set in Nanking, China, during the 1937 Nanking Massacre in the Second Sino-Japanese War.  A group of escapees, finding sanctuary in a church compound, try to survive the plight and persecution brought on by the violent invasion of the city. 72 Heroes is a 2011 Chinese historical drama film directed by Hong Kong film director Derek Chiu, better known as , based on the story of the 72 Martyrs who sacrificed their lives in the Second Guangzhou Uprising. The 31st Guangdong-Hong Kong Cup was held on January 2009.  Defending champions Hong Kong played against Guangdong at Yuexiushan Stadium on 1 January in the first leg and the second leg was played at Mong Kok Stadium on 4 January.  Hong Kong football representative team represented Hong Kong Team this year instead of Hong Kong League XI and 2008 Chinese third-tier league runners-up Guangdong Sunray Cave (Guangdong U19s) replaced Guangzhou FC as Guangdong Team to participate in this tournament.  Hong Kong won 5–4 on aggregate and were crowned their 13th Guangdong-Hong Kong Cup champions. Able Friend (Chinese 步步友: foaled 19 September 2009) is an Australian-bred, Hong Kong-trained Thoroughbred racehorse.  After showing some promise when winning one of his two races in his native country, the gelding was transferred to race in Hong Kong in 2013.  In the 2013/2014 season he established himself as one of the best milers in Hong Kong with four wins including the Hong Kong Classic Mile and the Chairman's Trophy from seven races.  In the following season his wins in the Jockey Club Mile (2014) and Hong Kong Mile saw him rated among the best racehorses in the world.  By the International Ratings of 127, he was officially the highest internationally rated Hong Kong racehorse ever.  He was crowned as the Hong Kong Horse of the Year in 2015. The Hong Kong Higher Level Examination () was a public examination taken by students in Hong Kong at the end of Form 6 (Lower Sixth), in preparation for entry to the Chinese University of Hong Kong (CUHK) which then offered 4 year courses.  It was different from the Hong Kong Advanced Level Examination taken by Form 7 (Upper Sixth) students, and was usually taken by students from Chinese Middle schools.  It was abolished in 1993 when the CUHK changed its courses to 3-years, the same as the Hong Kong University, after the introduction of the Joint University Programmes Admissions System in 1992. Kearen Pang is a Hong Kong cross-media creator who has written, directed and acted in theatrical productions and films.  She graduated from the Hong Kong Academy for Performing Arts, and joined the Chung Ying Theater Company in 1998 as a full-time actor.  She also participated in the theater in different positions, including stage director, musical, choreographer and producer.  She left Chung Ying in 2003.  In 2004 she studied in Paris Studio Magenia for mime and physical theater.  Her first film script was with Pang Ho-Cheung, co-director of the Berlin International Film Festival Silver Bear Award film Isabella (2006).  In 2005 she founded Kearen Pang Productions.  She was awarded the Best Actress (Comedy/Farce) at the Hong Kong Drama Awards.  In 2010, '’Sylvia'’ – an American drama was produced by Kearen Pang Production.  Kearen was the producer and main actress of the play – Sylvia.  This production was awarded as the 10 Most Popular Production of the Year in 2010, in the Hong Kong Drama Award.  "Sylvia" was then rerun in June 2011.  Kearen was elected by CNNGO. com as one of the "The Hong Kong Hot List: 20 People to Watch”, her drama play and script was described as “full of subtle drama and stealthy sentimentality that creeps into audiences hearts”.  In 2011, Kearen was elected by RTHK and Hong Kong Federation of Drama Societies as "The Most Impressive Actress" in HK theatre in past 20 years. The Back Door was an anonymous work of invasion literature serialised in Hong Kong newspaper "The China Mail" from 30 September through 8 October 1897.  The work, written in the form of a historical account, describes an imagined Russian and French landing at Hong Kong's Deep Water Bay, followed by shelling of Victoria Peak, a sea battle in the Sulphur Channel between Hong Kong Island and Green Island, and a last stand at Stonecutters Island in which British forces were decisively defeated.  The story was intended as a criticism of the lack of British funding for the defence of Hong Kong; fears of invasion were driven by French expansionism in Southeast Asia and increasing Russian influence in Manchuria.  It was speculated, but never proven, that members of the Imperial Japanese Army read the book in preparation for the 1941 Battle of Hong Kong, in which Japanese forces overran Hong Kong (via the New Territories, rather than Hong Kong Island) in just 18 days.  In terms of its style, it follows the model laid out by George Tomkyns Chesney's "The Battle of Dorking", but is noteworthy for its attention to detail, even giving real names of individual soldiers and ships; one reviewer described it as "unique" in its verisimilitude, stating that only William Le Queux's "The Invasion of 1910" and Cleveland Moffett's "" could compare to it. Trouble Maker () is a 1995 joint Taiwan and Hong Kong romance comedy film directed by Taiwanese director Kevin Chu and produced by Hong Kong director Wong Jing.  Starring Taiwanese actor singer Takeshi Kaneshiro, Hong Kong actor Ng Man-tat, Hong Kong actress Athena Chu and Taiwanese child actor Steven Hao Shao Wen.  The Hong Kong Chinese title 蠟筆小小生 translates as "Crayon Siao Siao San" which is derived from the popular Japanese manga "Crayon Shin-chan" about a mischievous little boy.  The movie was first released in Taiwan under the title "Fart King 臭屁王".  The movie was renamed and dubbed in Cantonese for all the Taiwanese actors to cater to the Hong Kong audiences.  Hong Kong actors Ng Man-tat, Athena Chu and Gabriel Wong Yat-San (known by his nickname "Small Turtle") filmed their lines in Cantonese which was dubbed over by an actor for the Mandarin version.  The movie was released in Taiwan on 25 March 1995 and then a week later on 1 April 1995 in Hong Kong. William Kong sometimes credited as Bill Kong () (born 1953) is a film producer known for his active role in the Hong Kong film industry and International co-production.  He is most famous for co-producing the wuxia film "Crouching Tiger, Hidden Dragon" (2000), which earned him an Academy Award nomination for Best Picture as well as a BAFTA Award for Best Film.  He co-produced the historical drama war film "The Flowers of War".  Among his other films are "Rise of the Legend" (2014) and "Monster Hunt" (2015), which was at the time of its release the largest grossing film in Chinese history. Fairy King Prawn (Chinese 靚蝦王: foaled 13 October 1995) was an Australian-bred, Hong Kong-trained Thoroughbred racehorse.  After being sold and exported to Hong Kong as a yearling he became one of the most successful and popular horses in his adopted territory.  Equally adept as a sprinter or as a miler he won twelve of his twenty-six starts including the Chairman's Sprint Prize (twice) the Hong Kong Sprint, Hong Kong Stewards' Cup and Bauhinia Sprint Trophy.  In 2000 he became the first Hong Kong horse to win a Grade One race abroad when he won the Yasuda Kinen in Japan.  He won numerous awards including the title of Hong Kong Horse of the Year on two occasions.  He was retired from racing in 2002 after undergoing surgery for serious leg injuries.  After working for several years at a Hong Kong riding school he was sent into full retirement in New Zealand in 2011.
Answer: 2011