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 Hong Kong Empire. In 1861, Governor Sir Hercules Robinson introduced the Hong Kong Cadetship, which recruited young graduates from Britain to learn Cantonese and written Chinese for two years, before deploying them on a fast track to the Civil Service. Cadet officers gradually formed the backbone of the civil administration. After the Second World War, ethnic Chinese were allowed into the service, followed by women. Cadets were renamed Administrative Officers in the 1950s, and they remained the elite of the Civil Service during British rule. The stability, security, and predictability of British law and government enabled Hong Kong to flourish as a