Hong Kong (香港,), officially the Hong Kong Special Administrative Region of the People's Republic of China (HKSAR), is a special administrative region of People's Republic of China. Hong Kong is one of the most densely populated places in the world. As a special administrative region, Hong Kong maintains separate governing and economic systems from that of mainland China under the principle of "one country, two systems". The territory is one of the world's most significant financial centres and commercial ports. It is the world's tenth-largest exporter and ninth-largest importer.
Hong Kong has a major capitalist service economy characterised by low taxation and free trade, and its currency, the Hong Kong dollar, is the eighth most traded currency in the world. Hong Kong is home to the second-highest number of billionaires of any city in the world, the highest number of billionaires of any city in Asia, and the largest concentration of ultra high-net-worth individuals of any city in the world. Although the city has one of the highest per capita incomes in the world, severe income inequality exists among the population.
Hong Kong is a highly developed territory and ranks fourth on the UN Human Development Index. The city has the largest number of skyscrapers of any city in the world, and its residents have some of the highest life expectancies in the world. The dense space led to a developed transportation network with public transport rates exceeding 90 percent.
Hong Kong is rated Alpha + by the Globalization and World Cities Research Network (GaWC) which evaluates and ranks the relationships between world cities in the context of globalisation. Alpha level cities are linked to major economic states and regions and into the world economy, Alpha + cities are highly integrated cities, filling advanced service needs
Hong Kong is the #5 city in the world according to the Global Financial Centres Index (GFCI) which evaluates and ranks the competitiveness of the major financial centres of the world according to a wide range of criteria – Human Capital, Business, Finance, Infrastructure and Reputation.
Hong Kong is the #9 city in the world according to the Global Power City Index (GPCI) which evaluates and ranks the major cities of the world according to their magnetism, or their comprehensive power to attract people, capital, and enterprises from around the world. It does so through measuring six key functions: Economy, Research and Development, Cultural Interaction, Liveability, Environment, and Accessibility.
Hong Kong has a population of over 7,298,600 people. Hong Kong also forms part of the wider Hong Kong metropolitan area which has a population of over 7,491,000 people.
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