"One country, two systems" is a constitutional principle of the People's Republic of China (PRC) describing the governance of the special administrative regions of Hong Kong and Macau.
Sign in Xiamen reading "一国两制统一中国" (Yīguó liǎngzhì tǒngyī Zhōngguó, transl. One country, two systems unites China)
Office of the Government of the Hong Kong SAR in Beijing
Liaison Office of the Central People's Government in the Hong Kong SAR
Office of the Macau Special Administrative Region in Beijing
Special administrative regions of China
The special administrative regions (SAR) of the People's Republic of China are one of four types of province-level divisions of the People's Republic of China directly under the control of its Central People's Government, being integral areas of the country. As a region, they possess the highest degree of autonomy from China's central government. However, despite the relative autonomy that the Central People's Government offers the special administrative regions, the National People's Congress and its Standing Committee remains capable of enforcing laws for the special administrative regions.
Economic and Trade Office in London
Macao Economic and Commercial Office in Lisbon