These three people are Qi Huangong, King Wuling of Zhao and Liang Wudi. And Qi Huangong didn't know that hanging corpse stinks until he was starved to death. In fact, it dates back to Qi Huangong's later years, when Qi Huangong was seriously ill. His so-called filial children are fighting for Qi Huangong's status and wealth, and there is no extra time to take care of this paraplegic old man.

At that time, the minions in Qi Huangong were busy trying to please their next master, and no one cared about his life. As a result, due to neglect, Qi Huangong in the hospital bed was starved to death, and no one knew when he died, so he kept it for a month or two until he was covered with bugs and smelled bad.

The second king Wuling of Zhao wanted to hand over power to his two children, but he forgot the truth that one mountain can't accommodate two tigers. In the end, his sons killed each other, and he was also placed under house arrest by his son. He didn't even give him food, and the only remaining food was quickly eaten up by him. Finally, they were forced to eat the birds in their nests alive and starved to death a few months later.

The third emperor, Liang Wudi, was imprisoned by one of his rebels when he launched a rebellion. Before he starved to death, he just wanted to take a sip of honey water, but because no one took care of him, he groaned twice and starved to death. I think the fate of these three emperors is really miserable, but I think the emperors should protect themselves first. When we look back at history, most emperors also wisely chose some ways to protect themselves in their later years.