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 Hong Kong franchise to include them. The Sino-British Joint Declaration was signed by both the Prime Minister of the United Kingdom and the Premier of the People's Republic of China on 19 December 1984 in Beijing. The Declaration entered into force with the exchange of instruments of ratification on 27 May 1985 and was registered by the People's Republic of China and United Kingdom governments at the United Nations on 12 June 1985. In the Joint Declaration, the People's Republic of China Government stated that it had decided to resume the exercise of sovereignty over Hong Kong (including Hong Kong Island, Kowloon,