Hong Kong–United Kingdom relations a deeply important role in the formation of the modern Hong Kong. Sovereignty of Hong Kong was ceded to the UK "in perpetuity" on 29 August 1842 through the Treaty of Nanking. The UK further expanded the territory of Hong Kong in 1860 by another cessation, plus a 99-year lease of the New Territories in 1898. The stability, security, and predictability of British law and government enabled Hong Kong to flourish as a centre for international trade. Localisation of teritary institutions, the Hong Kong government and the independent Judiciary in the run-up to the 1997 Handover of sovereignty, caused a
British nationality law and Hong Kong British nationality law and Hong Kong British nationality law as it pertains to Hong Kong has been unusual ever since Hong Kong became a British colony in 1842. From its beginning as a sparsely populated trading port to today's cosmopolitan international financial centre of over seven million people, the territory has attracted refugees, immigrants and expatriates alike searching for a new life. Citizenship matters were complicated by the fact that British nationality law treated those born in :Hong Kong as British subjects (although they did not enjoy full rights and citizenship), while the People's Republic of China did not recognise