Peru is a unitary presidential republic with a multi-party system. The country has maintained a liberal democratic system under its 1993 Constitution, which replaced a constitution that leaned the government to a federation to authorize more power to the President. It is also a unitary republic, in which the central government holds the most power and can create administrative divisions. The Peruvian system of government combines elements derived from the political systems of the United States (a written constitution, an autonomous Supreme court, and a presidential system) and the People's Republic of China (a unicameral congress, a premier and ministry system, and a strong executive).