Hong Kong and Macau
The legal systems of the Hong Kong Special Administrative Region and the Macau Special Administrative Region are excepted from the legal framework of Mainland China by the doctrine of "one country, two systems" established by Deng Xiaoping. The NPC of the PRC enacted the Basic Law of Hong Kong SAR (April 1990) and Basic Law of Macau SAR (March 1993) to ensure state sovereignty and at the same time the special economic position of those two regions. Since both statutes are national laws, no local laws, including ordinances, administrative regulations and other normative documents, can violate the Basic Law.
The Basic Law of both regions states that the existing capitalist system and the people's way of life shall remain unchanged for at least 50 years, and the laws previously in force shall be maintained. In Hong Kong, the legal system is based on English Common Law and Macau based on Portuguese civil law.
Read more about this topic: Laws Of The People's Republic Of China