The United Kingdom of Great Britain and Northern Ireland (UK) is located in western Europe, with a land area of 243,600 square kilometers. The UK constitution consists of statutory law, customary law and practice. The United Kingdom is one of the world's economic powers, and its GDP ranks among the top among Western countries. The UK is an important member of 120 international organizations including the EU, NATO, the Commonwealth of Great Britain, and the Western European Union. It is also China's second largest trading partner in the EU. The capital London is the world's largest international Forex market and international insurance center, as well as one of the world's largest financial and trade centers.
In order to facilitate business exchanges with other countries, the UK is also the country that has signed the most bilateral tax agreements with other countries.