This is true for countries with democratic parliamentary systems. The presidents are the nominal supreme leaders, but the actual power is still in the prime minister and cabinet meetings, such as Germany and the United Kingdom.

The difference between the Prime Minister and the President is: the Prime Minister is the head of government and the President is the head of state.
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The highest leader of Germany's country is the president, the head of the cabinet is called the Prime Minister, and the democratic parliamentary system countries are like this. The president is the highest leader in name, but the actual power is still in the prime minister and cabinet meetings, such as Germany and the United Kingdom; the highest leader of France is the president. Because France adopts the presidential republic system degrees, the president has great power and is both commanders of the armed forces, such as France, the United States, Russia, etc.

Expansion information: 1. The head of government refers to the leaders of a government or cabinet, with different names, such as "Prime Minister of the State Council", "Prime Minister (Minister)", "Prime Minister", "Chairman of the Council of Ministers", etc. In a parliamentary country, the head of government is generally called the Prime Minister.
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2. The head of state is the supreme head of a country and the supreme representative of a country in essence or form, both internal and external. Due to the different political systems of each country, the actual power exercised by the head of state is also different. In countries that implement the cabinet system , the head of state generally does not directly hold the pragmatic power of the state, but only engages in some symbolic and etiquette activities in the name of the state, so it is called the head of virtual power.

3. " Constitution of the People's Republic of China " stipulates that the powers of the head of state are exercised by the President of the People's Republic of China. When the President of the People's Republic of China is absent, the Vice Chairman shall succeed to the position of Chairman.
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When the vice president of the People's Republic of China is absent, the National People's Congress will be elected by-elected. When the President and Vice President of the People's Republic of China are absent, before the new President and Vice President are appointed, the Chairman of the Standing Committee of the National People's Congress shall temporarily exercise the powers of the head of state.