Hong Kong, Macau & the 'one country, two systems' model
The constitutional and legal architecture of 'one country, two systems' as applied to Hong Kong and Macau, for the Guokao political-theory paper.
The constitutional source of 'one country, two systems'
The formula yiguo liangzhi ('one country, two systems') was conceived by Deng Xiaoping in the early 1980s, initially to address Taiwan, but first operationalised for Hong Kong and Macau. Its supreme domestic legal anchor is Article 31 of the Constitution of the People's Republic of China (1982), which authorises the state to establish special administrative regions (SARs) when necessary, with systems to be prescribed by law enacted by the National People's Congress (NPC) 'in the light of specific conditions'. Article 31 is the constitutional hook; the operating manual for each region is its Basic Law, a national law passed by the NPC.
The two handovers and the treaty basis
Hong Kong's return rests on the Sino-British Joint Declaration, signed 19 December 1984 and registered with the United Nations, under which the United Kingdom restored Hong Kong to the PRC on 1 July 1997. Macau's return rests on the Sino-Portuguese Joint Declaration of 13 April 1987, with the handover on 20 December 1999. China's position is that the Joint Declarations were transitional instruments whose mission was completed at handover; the UK and others treat the Hong Kong declaration as a continuing treaty obligation. This contested legal status is itself an exam-relevant point.
The Basic Laws
The Hong Kong Basic Law was adopted by the NPC on 4 April 1990 and took effect on 1 July 1997. The Macau Basic Law was adopted on 31 March 1993, effective 20 December 1999. Each promises a 'high degree of autonomy', an independent judiciary with power of final adjudication (the Court of Final Appeal in Hong Kong from 1997 replaced appeals to the Privy Council in London), and preservation of the capitalist system and existing way of life for 50 years — i.e. to 2047 for Hong Kong and 2049 for Macau. Hong Kong's Article 5 guarantees that the socialist system 'shall not be practised'.
Powers reserved to the centre
Autonomy is delegated, not sovereign. The Central People's Government retains foreign affairs and defence (Hong Kong Basic Law Articles 13–14; the People's Liberation Army garrison is stationed in Hong Kong). Critically, the NPC Standing Committee (NPCSC) holds the power of final interpretation of the Basic Law under Article 158 (Hong Kong) and Article 143 (Macau). The NPCSC has exercised this five times for Hong Kong — notably the 1999 interpretation reversing the Court of Final Appeal's right-of-abode ruling in Ng Ka Ling v Director of Immigration, and the 2016 interpretation on oath-taking under Article 104. Understanding that interpretation, not adjudication, is the ultimate constitutional backstop is the conceptual key to the entire model.