What political systems do countries in the world have?

China is a people's congress system, which is a unique political system in socialist countries; The United States is a presidential parliamentary system, and most countries have this system, such as France, Germany, South Korea, etc., which is an institutional form of capitalist politics; Britain is a constitutional monarchy, which is used by the Commonwealth and former British colonial countries. This is another institutional form of capitalist politics. There is also a Committee system, which is typical of Switzerland. There is no head of state, and the Committee is the highest institution. There are few countries in this system. All countries in the world are mainly one of the above four systems.