Question: The modern setting of Blind Detective was ruled by the British Empire starting when?

full_context: Document 1: British Empire: By the start of the 20th century, Germany and the United States challenged Britain's economic lead. Subsequent military and economic tensions between Britain and Germany were major causes of the First World War, during which Britain relied heavily upon its empire. The conflict placed enormous strain on the military, financial and manpower resources of Britain. Although the British Empire achieved its largest territorial extent immediately after World War I, Britain was no longer the world's pre-eminent industrial or military power. In the Second World War, Britain's colonies in South-East Asia were occupied by Imperial Japan. Despite the final victory of Britain and its allies, the damage to British prestige helped to accelerate the decline of the empire. India, Britain's most valuable and populous possession, achieved independence as part of a larger decolonisation movement in which Britain granted independence to most territories of the Empire. The transfer of Hong Kong to China in 1997 marked for many the end of the British Empire. Fourteen overseas territories remain under British sovereignty. After independence, many former British colonies joined the Commonwealth of Nations, a free association of independent states. The United Kingdom is now one of 16 Commonwealth nations, a grouping known informally as the Commonwealth realms, that share one monarch—Queen Elizabeth II.
Document 2: Casino Raiders: Casino Raiders is a 1989 Hong Kong action drama film written and directed by Jimmy Heung and Wong Jing and starring Andy Lau, Alan Tam, Idy Chan and Rosamund Kwan. It belonged to the early part of the 1989-1996 period, a period when gambling-themed films were dominating the Hong Kong movie scene. The film was followed by two sequels "No Risk, No Gain" (1990) and "Casino Raiders II" (1991) which have new storylines.
Document 3: Shanghai 13: Shanghai 13, also known as The Shanghai Thirteen, is a 1984 Hong Kong-Taiwanese martial arts film written and directed by Chang Cheh and starring an ensemble cast of notable film stars such as Andy Lau, Jimmy Wang Yu, Ti Lung, Chen Kuan-tai, Danny Lee, Bryan Leung, David Chiang, Chiang Sheng, Chi Kuan-chun, Chan Sing, Lu Feng and more.
Document 4: A Taste of Killing and Romance: A Taste of Killing and Romance is a 1994 Hong Kong action romantic thriller film produced and directed by Veronica Chan and starring Andy Lau and Anita Yuen as a pair of assassins who unknowingly work for the same organisation that meet and eventually fall in love.
Document 5: Handover of Hong Kong: The transfer of sovereignty over Hong Kong from the United Kingdom to China, referred to as ``the Handover ''internationally or`` the Return'' in China, took place on 1 July 1997. The landmark event marked the end of British administration in Hong Kong, and is often regarded as marking the end of the British Empire.
Document 6: British Hong Kong: British Hong Kong was the period during which Hong Kong was under British Crown rule from 1841 to 1997 (excluding the Japanese occupation from 1941 to 1945). It was established as a Crown colony and later designated a British Dependent Territory in 1981. Hong Kong Island was ceded to the United Kingdom by the Qing dynasty of China after the First Opium War (1839 -- 42). The Kowloon Peninsula was added to the colony after the Second Opium War (1856 -- 60). Finally, in 1898, the New Territories were added under a 99 - year lease. Although Hong Kong Island and Kowloon were ceded to Britain in perpetuity, the New Territories -- which comprised over 90 per cent of Hong Kong's land -- had such a vital role in the economy that the British government agreed to transfer sovereignty of the entirety of Hong Kong to China upon the expiration of the lease in 1997. The transfer has been credited by some as marking the end of the British Empire.
Document 7: Handover of Hong Kong: The transfer of sovereignty over Hong Kong from the United Kingdom to China, referred to as ``the Handover ''or`` the Return'' internationally, took place on 1 July 1997. The landmark event marked the end of British administration in Hong Kong, and is often regarded as marking the end of the British Empire.
Document 8: Casino Raiders II: Casino Raiders II is a 1991 Hong Kong action drama film directed by Johnnie To and starring Andy Lau, Dave Wong, Jacklyn Wu and Monica Chan. Despite the title, the film is the third installment in the "Casino Raiders" film series, following "Casino Raiders" (1989) and "No Risk, No Gain" (1990). The film franchise all have different storyline while sharing a common principal star of Andy Lau.
Document 9: Infernal Affairs III: 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.
Document 10: Handover of Hong Kong: The Handover of Hong Kong (or simply ``the Handover ''), also known as`` the Return'' in mainland China, was the transfer of sovereignty over Hong Kong from the United Kingdom to China in a ceremony on 30 June 1997. The territory of Hong Kong comprised Hong Kong Island and the Kowloon Peninsula, which were ceded to Britain in 1842 and 1860, respectively, and the New Territories, which was leased for 99 years in 1898. The retrocession of Hong Kong Island and Kowloon was conducted to coincide with the expiration of the New Territories' lease at midnight on 30 June. The landmark event marked the end of British rule in Hong Kong, and is regarded by some as marking the end of the British Empire.
Document 11: The Fun, the Luck & the Tycoon: The Fun, the Luck & the Tycoon is a 1990 Hong Kong comedy film directed by Johnnie To and starring Chow Yun-fat, Sylvia Chang, Nina Li Chi and Lawrence Cheng.
Document 12: British Hong Kong: British Hong Kong was the period during which Hong Kong was under British Crown rule from 1842 to 1997 (excluding the Japanese occupation from 1941 to 1945). It was established as a Crown colony and later designated a British Dependent Territory in 1981. Hong Kong Island was ceded to the United Kingdom by the Qing dynasty of China after the First Opium War (1839 -- 1842). The Kowloon Peninsula was added to the colony after the Second Opium War (1856 -- 1860). Finally, in 1898, the New Territories were added under a 99 - year lease. Although Hong Kong Island and Kowloon were ceded to Britain in perpetuity, the New Territories -- which comprised over 90 per cent of Hong Kong's land -- had such a vital role in the economy that the British government agreed to transfer sovereignty of the entirety of Hong Kong to China upon the expiration of the lease in 1997. The transfer has been considered by many as marking the end of the British Empire.
Document 13: Blind Detective: Blind Detective is a 2013 Hong Kong-Chinese action crime romantic comedy film directed by Johnnie To and starring Andy Lau and Sammi Cheng.
Document 14: Handover of Hong Kong: The transfer of sovereignty over Hong Kong, commonly known as the handover of Hong Kong (or simply ``the Handover '', also`` the Return'' in mainland China) was the transition of control over the former British colony of Hong Kong from the United Kingdom to the People's Republic of China on 1 July 1997. The returned territory comprised Hong Kong Island and the Kowloon Peninsula, which were respectively ceded to Britain in 1842 and 1860, as well as the New Territories, which were leased for 99 years from 1898. The transfer was arranged to coincide with the expiration of this lease on the previous day, 30 June 1997. This event marked the end of British rule in Hong Kong, and is regarded by some as the end of the British Empire.
Document 15: British Empire: In September 1982, Prime minister Margaret Thatcher travelled to Beijing to negotiate with the Chinese government on the future of Britain's last major and most populous overseas territory, Hong Kong. Under the terms of the 1842 Treaty of Nanking, Hong Kong Island itself had been ceded to Britain in perpetuity, but the vast majority of the colony was constituted by the New Territories, which had been acquired under a 99-year lease in 1898, due to expire in 1997. Thatcher, seeing parallels with the Falkland Islands, initially wished to hold Hong Kong and proposed British administration with Chinese sovereignty, though this was rejected by China. A deal was reached in 1984—under the terms of the Sino-British Joint Declaration, Hong Kong would become a special administrative region of the People's Republic of China, maintaining its way of life for at least 50 years. The handover ceremony in 1997 marked for many, including Charles, Prince of Wales, who was in attendance, "the end of Empire".
ground_truth: 1842
sub_queries: Which place is Blind Detective in? Answer: Hong Kong
when was Hong Kong taken by the british Answer: 1842