Question: What is the police force who uses the Mercedes-Benz Sprinter police van and is also the largest disciplined service under the Security Bureau of Hong Kong formed on 1 May 1844?
Context: The Government Flying Service (GFS) is a disciplined unit of the Government of Hong Kong.  It was established on 1 April 1993, when Hong Kong was under British rule.  It then took over all the non-military operations of the Royal Hong Kong Auxiliary Air Force (RHKAAF), which was an auxiliary unit of the United Kingdom Royal Air Force.  After Hong Kong was handed over to the People's Republic of China in 1997, the GFS remains as a government unit of the Hong Kong Special Administrative Region, and is responsible for search and rescue (SAR), air ambulance, firefighting, and police operations. Police vehicles in Hong Kong are vehicles of the Hong Kong Police Force, vehicles differ considerably depending on the duties of the departments that the vehicle is assigned to.  One of the most commonly seen police vehicles in Hong Kong is the Mercedes-Benz Sprinter police van, which is mostly used by district stations and the Emergency Unit, one of the roles expected of it is rapid response to 999 emergency calls with regards to road safety and public safety. The history of the Hong Kong Police originates in 1841, when the Hong Kong Police Force (HKPF) was officially established by the British colonial government, the same year that the British had settled in Hong Kong.  While changes have been implemented throughout the People's Republic of China (PRC) since the transfer of sovereignty in 1997, the Hong Kong Police Force (formerly the Royal Hong Kong Police Force) has since been responsible for serving the city. Deng Yuanzhao or Deng Fa () (March 7, 1906 – August 4, 1946) was an early leader of the Chinese Communist Party.  He was born in Yuncheng District, Yunfu, Guangdong, and participated in the Canton–Hong Kong strike and the Guangzhou Uprising in his youth.  He later engaged in underground work in Guangzhou and Hong Kong for the CCP, and become Party Committee Secretary of Guangzhou and Hong Kong and head of the Organisation Department in Guangdong.  After 1931, he was active in the Jiangxi–Fujian Soviet and worked as the Party Committee Secretary of Fujian, and head of the State Political Security Bureau.  He later assisted in the war, becoming the Political Director of the Shaan-Gan Army's 3rd Column, in charge of the secret police.  His handling of the position earned him the nickname of China's Dzerzhinsky; he was present in the Long March.  During the Second Sino-Japanese War, he was appointed representative of the CCP to Xinjiang, and among other positions, became the fifth president of the Party School of the Central Committee of the Communist Party of China, the highest training center for party workers and leaders.  Deng served as principal from 1939 to 1942.  He died in a plane crash in 1946, along with other senior Communist leaders including Ye Ting, Bo Gu, and Wang Ruofei. In India, the Director General of Police (DGP) is a three-star rank and the highest ranking police officer in Indian States and Union Territories.  All DGPs are Indian Police Service (IPS) officers.  The DGP is usually the head of the state police force in every Indian state in which case the officer is called State Police Chief, which is a cabinet selection post.  Vis-a-vis other All India Services it is equal in rank to the Head of Forest Forces for the Indian Forest Service.  There may also be additional officers in the state who hold the rank of DGP.  Common appointments for such officers include Director of Vigilance and Anti-Corruption Bureau, Director General of Prisons, Director General of fire forces and civil defence, Criminal Investigation Department (CID), Police Housing Society etc.  Additionally officers who hold the rank of DGP may have commensurate appointments in central government organisations such as Director, Central Bureau of Investigation (CBI), Director SVPNPA, DG Central Reserve Police Force (CRPF) etc.  The rank insignia of a Director General of Police or Commissioner of Police (in Delhi) is the national emblem over crossed sword and baton. The Beijing Special Weapons and Tactics Unit (Abbr. : SWAT; ; also known as Beijing Special Police Force) is a police unit in the People's Republic of China that deals with incidents beyond the capabilities of normal patrol officers such as hostage situations, high risk warrants and riot control.  The unit, along with the Snow Leopard Commando Unit, was tasked with many of the security responsibilities of the 2008 Summer Olympics.  It is reputed to be one of the most well-equipped and well-trained of all the SWAT/Special Police Units in the PRC.  It is under the control of the Beijing Municipal Public Security Bureau. Meeting Point (Chinese: 匯點) was a liberal political organisation and party in Hong Kong formed by a group of former student activists in the 1970s and intellectuals for the discussion for the Sino-British negotiation on the question of Hong Kong prospect in 1983.  It was one of the earliest groups in Hong Kong that favoured Chinese sovereignty over Hong Kong but wanted a free, democratic and autonomous Hong Kong. The Hong Kong Police Band (Abbreviation: HKPB; ) is a ceremonial unit and a military band of the Hong Kong Police Force and is used for official events.  It was established in 1954 and initially performed with the Hong Kong Police Silver Band (formed in 1951).  Both bands merged to form a single band and was later renamed the Royal Hong Kong Police Pipe Band.  The Pipe Band colours is the MacIntosh tartan and was adopted in memory of a former Commissioner of Police, Mr Duncan William MacIntosh, after which the MacIntosh Forts were also named. The Hong Kong Police Force (HKPF) () is the largest disciplined service under the Security Bureau of Hong Kong.  It is the world's second, and Asia's first, police agency to operate with a modern policing system.  It was formed on 1 May 1844 by the British Hong Kong government with a strength of 32 officers.  In 1969, Queen Elizabeth II granted the 'Royal' prefix and the HKPF became the "Royal Hong Kong Police Force", only to be removed in 1997 upon the transfer of sovereignty of Hong Kong to China. Wu Changshun (born January 1954) is the former police chief of the municipality of Tianjin, China.  Wu is also an inventor, and has 35 patents and utility models to his credit.  Wu spent 44 years working for the Tianjin Public Security Bureau (i.e. police force) and was the chief of the police force for some eleven years.  Wu was dismissed from office in July 2014, and was placed under investigation by the Communist Party's anti-corruption agency.  He was expelled from the party in February 2015.
Answer: Hong Kong Police Force