Who among the emperors of China's past dynasties was known as the "Fool Emperor"?

The Fool Emperor - Emperor Hui of Jin. (zhuan) After the death of Emperor Wu of Jin Sima Yan in 290 AD, his son Sima Zhong came to the throne and became Emperor Hui of Jin. Emperor Hui of Jin was a typical incompetent emperor in Chinese history. He has not loved reading since he was a child. He only knows how to eat, drink and have fun all day long and does not do his job properly. Sima Yan was very worried about this, worried that Sima Zhong would lose the family business created by his ancestors. Once, in order to test Sima Zhong's thinking ability, Sima Yan specially asked him a few questions and gave him three days to submit the papers. After Sima Zhong got the question, he didn't know how to answer it. His wife Jia Nanfeng was a very smart person. Seeing this, she immediately invited several learned old gentlemen to answer Sima Zhong's problems. After reading the answer sheet, Sima Yan felt that his son's thinking was still very clear, so he felt relieved. But after Sima Yan died and Sima Zhong came to the throne, he was asked to make his own decisions when encountering problems, which caused a lot of jokes. One summer, Emperor Hui and his entourage went to Hualin Garden to play. They walked to a pond and heard the sound of frogs croaking inside. Emperor Hui felt very strange, so he asked his followers whether these croaking things were for official or private purposes. The attendant felt that the emperor's question was ridiculous, but he couldn't help but answer it, so he said: "If you call someone in an official's house, it belongs to the official family; if you call someone in a private home, it belongs to a private person." There was another year of famine, and the people had no food. Eat, there are people starving to death everywhere. Someone reported the situation to Emperor Hui of Jin Dynasty, but Emperor Hui said to the reporter: "There is no food to eat, why not eat meat porridge?" The person who reported the report couldn't laugh or cry. The victims couldn't even eat, so where could they get meat? Where's the porridge? This shows how stupid and confused Emperor Hui of Jin was. No wonder he was usurped from the throne by King Sima Lun of Zhao during the "Eight Kings Rebellion".