This is because Liu Xu later cursed the monarch with witchcraft many times, so when this incident was accused by Emperor Gaozu Xuan Di, he committed suicide out of fear and regret. Liu Xu ranked fourth among the descendants of Emperor Wu of the Han Dynasty, and when he was a little older, he became king of Guangling. Liu Xu is very tall and has great strength. It is said that he is strong enough to carry a huge tripod by himself. Besides, Liu Xu is also very brave. He fought against wild animals such as bears. However, Liu Che did not choose Liu Xu as the heir to the throne because of these advantages. The reason is that Liu Xu often breaks the law by virtue of his own advantages and crown prince status.

Liu Xu, who lost the right to inherit the throne, grew up and went to a fief. Liu Xu, who is far away from Beijing, has not completely put down his coveted throne. After Zhao Han succeeded to the throne, Liu Xu went to Beijing to meet the sage in the name of celebration. Zhao Han not only gave him many jewels and money, but also sealed tens of thousands of food cities. Seven years later, the king changed again, and the newly enthroned emperor Zhao Han also attached great importance to Liu Xu and gave his four sons many rewards. But Liu Xu wants to seize the throne because Emperor Hanzhao has never had any children.

The way for Liu Xu to seize the throne was not to fight, but to secretly find a witch to curse Zhao Han. The witch's name is Li Nvxu, and Liu Xu trusts her very much. After Zhao Di, Emperor Gaozu, died at the age of 21, Liu Xu regarded her as the credit of Li Nvxu, so she became more and more dependent on her. After the death of Emperor Zhao of Han Dynasty, Liu He, the new emperor supported by Huo Guang, was deposed in less than a month because of his debauchery, so Liu Xu once again thought that Li Nvxu's curse was at work.

Liu Xu secretly cursed the emperor for more than ten years. It was not until Xuan Di, the Emperor of the Han Dynasty, made him a prince that he realized that he had never had a chance to be the son of heaven, so he stopped swearing. But before long, Liu Xu cursed again because of his son's crime. However, this time, Liu Xu used witchcraft to curse and was reported by the defendant to Xuan Di, the Emperor of the Han Dynasty. When Xuan Di knew about it, he sent someone to find out the truth, instead of killing Liu Xu at the suggestion of an official. Liu Xu was very flustered in the face of the investigation and finally confessed to the curse. Soon after, he hanged himself after telling his son that he let the emperor down too much.