The father of the first emperor in China was actually Ying Zheng, the father of Qin Shihuang. When he was young, Zi Chu went to Zhao as an underground prisoner, but because of this, he got help from others, and now he came to Qin and became the later Qin Shihuang. A few years later, Ying Zheng, the first Qin Emperor, made Zi Chu the emperor's father. The father of the first emperor of China was posthumously sealed, and did not enjoy much wealth when he was in office.
The worst emperor in history should be Li Yuan, the founding emperor of the Tang Dynasty. Tang Gaozu doesn't really have much talent. He was able to sit on the throne because his son Li Shimin was very clever, but when Tang Gaozu became emperor, he completely forgot about Li Shimin. Li Shimin later launched the change of Xuanwu Gate, and Tang Gaozu was also the emperor's father who was forced to abdicate. After Li Shimin succeeded to the throne, Tang Gaozu became the emperor's father. Although his life in the palace is relatively comfortable, there is always no one to trust around him. Only his daughter-in-law will visit him from time to time when he is old. Although Tang Gaozu's life was materially satisfied, he was mentally miserable after he became the emperor's father.
Li Longji abandoned Chaogang in his later years, which led to Anshi Rebellion. Finally, after his concubine Yang Guifei was executed, the matter was finally solved. When Li Longji fled to Shu, the prince seized the throne at this time. In this case, he can only ask for it. When he became the emperor's father, his life was still miserable. After all, my favorite concubine died and my son did such a thing. It will be difficult for anyone to keep it in mind.