The succession of the emperor is very common in history, Qin Shi Huang as the first emperor in Chinese history, after his sudden death, there was a mutual competition between Hu Hai and Fu Su, and the last funerary product of the competition was the glorious Jiangshan of Great Qin, and in the later generations such an imperial succession was still staged, Tang Dynasty Li Shimin competed for the throne to kill his brother Li Jiancheng, younger brother Li Yuanji, forcing his father Li Yuan to abdicate and give way to Xian, although Li Shimin became an excellent emperor, but because of the black history of the throne, he has not had Taishan Fengchan, Satisfy your own vanity. After the death of zhao Kuangyin, the founding emperor of the Song Dynasty, the emperor's position was handed over to his younger brother Zhao Guangyi, and after the death of the founding emperor of the Ming Dynasty, Zhu Yuanzhang, passed the throne to his eldest grandson Zhu Yunjiao, and as a result, his son Zhu Di had opinions, and the imperial throne competition between uncles and nephews also appeared on the historical stage, which was a dispute brought about by the imperial throne and was a very common historical situation.

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But there is such a complicated situation in history, if the emperor suddenly dies, and there are taishang emperors and princes above the court at the same time, who can become the new emperor. The reason why such a situation is rare in history is that The Taishang Emperor is very rare, there are many emperors in the history of five thousand years, but the Taishang Emperor is a handful, this is because the Taishang Emperor is not a good position, Liu Bang jianguo only in order not to let his father give himself a salute, named Liu Taigong as the Taishang Emperor, this is the first Taishang Emperor in history, and the only person who did not become an emperor directly as the Taishang Emperor, in the later life Li Yuan and Qianlong became the Taishang Emperor with completely different treatment, this hypothesis almost did not happen in history, but in the interesting Ming Dynasty , such a thing did happen.
Emperor Zhu Qizhen of the Ming Dynasty served two imperial thrones, the first time he ascended the throne, he re-eunuch Wang Zhen, listened to rumors and took the elite imperial conquest of the Ming Dynasty, buried all the strength of the Ming Dynasty in Tumu Fort, and himself became a prisoner of the order, in order to make the Ming Dynasty not to be threatened, his brother was in danger and became the new emperor, Zhu Qizhen also became the glorious Taishang Emperor, and Zhu Qizhen, who returned to the Central Plains Dynasty many years later, became the imprisoned Taishang Emperor, and the empire continued to develop at the hands of his brother, but his brother was a short-lived emperor. Died in a coup d'état in the palace, Zhu Qizhen, the Emperor Taishang, successfully restored and became the new emperor, if Zhu Qizhen did not launch a coup d'état at that time, would the throne be his Emperor Taishang or the prince at that time?
Answering this question is very painful, because the Emperor Taishang is basically an elderly man, there is no desire for power to become the Emperor Taishang, if you encounter the Emperor Taishang who does not cling to power, the natural prince can inherit the throne, if you meet the Emperor Taishang who still has the ability and ambition, there may be a new confrontation in the struggle for the throne, for the throne, it may also be based on their own ability, this situation is basically Li Shimin's sudden violent death, is Li Yuan's restoration or the prince on the throne, is a historical problem.