Conservatism in Hong Kong the way to maintain the "status quo" of Hong Kong. They initially supported the British Conservative Prime Minister Margaret Thatcher's efforts in insisting the validity of the Treaty of Nanking of 1842. However, Deng Xiaoping, the Chinese paramount leader insisted in restoring sovereignty in Hong Kong in 1997, but guaranteed the "capitalist system and way of life shall remain unchanged for 50 years," which was later written in the Article 5 of the Hong Kong Basic Law. Besides its "Old Left" Beijing loyalists in the colony which were represented by the Hong Kong Federation of Trade Unions (HKFTU), the Communist
British nationality law and Hong Kong on or after 1983 to a parent settled in Hong Kong are BDTCs. The law also stated that British Citizens or BDTCs by descent could not automatically pass on British nationality to a child born outside the United Kingdom or the dependent territories concerned unless a parent acquired citizenship otherwise than by descent. Negotiation concerning the future of Hong Kong started in the late 1970s between Britain and China. With the signing of the Sino-British Joint Declaration on 19 December 1984, the future of Hong Kong was set, with China to assume sovereignty of the entire territory of Hong Kong