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
Hong Kong independence parties, such as the Alliance of Resuming British Sovereignty over Hong Kong and Independence (BSHI) and the Hong Kong Independence Party, call for the return of British rule. According to a survey conducted by the Chinese University of Hong Kong (CUHK) in July 2016, around a sixth of Hong Kong's population support the territory becoming an independent entity after 2047, nearly 40% of Hongkongers aged 15 to 24 supported the territory becoming an independent entity, despite 3.6% stated that they think it is "possible". Reasons that have been cited in favour of independence include: The Chinese government firmly opposes Hong