List of national legal systems
Common law is currently in practice in Ireland, most of the United Kingdom (England and Wales and Northern Ireland), Australia, New Zealand, Bangladesh, India (excluding Goa), Pakistan, South Africa, Canada (excluding Quebec), Hong Kong, the United States (on a state level excluding Louisiana), and many other places. In addition to these countries, several others have adapted the common law system into a mixed system. For example, Nigeria operates largely on a common law system, but incorporates religious law.
Department of Justice (Hong Kong)
The main principle of basic law is “one country, two system”. Although China took back Hong Kong in 1997, the previous law in force in Hong Kong(laws of equity, ordinances, subordinate, subordinate legislation, common law and customary law) still remain unchanged for 50 years. Except some law related to foreign affairs and defense, nation law of China will not apply on Hong Kong.