When Zhao Huiwen's father and son visited the sand dunes, Zhang He, the son of Zhao Huiwen, launched a riot and killed Zhao Huiwen's assistant minister in an attempt to murder Zhao Huiwen.
Gongzi Cheng and Li Dui saved Huiwen from danger, so they were both promoted. Here, Gongzi Zhang fled to King Wuling of Zhao for refuge, and King Wuling of Zhao really agreed.
So Gongzi Cheng and Li Dui sent troops to besiege the dune palace where King Wuling of Zhao lived and killed Gongzi Zhang. But it is a great sin to besiege the king of a country. Gongzi Cheng and Li Dui continued their siege, with no food and clothing until King Wuling of Zhao finally starved to death.
Extended data:
During the Warring States period, there was chaos in the world, and saints and heroes emerged one after another. King Wuling of Zhao is undoubtedly one of the representatives. King Wuling of Zhao is the most influential monarch of Zhao. His "Khufu riding and shooting" made Zhao a military power that could compete with Qin.
In the twenty-seventh year of King Wuling of Zhao (in the first 299 years), King Wuling of Zhao gave way to Prince He, that is, King Huiwen of Zhao, who called himself "King Tai Shang Huang", that is, "King Tai Shang Huang" of Zhao. King Wuling of Zhao did this in order to concentrate Zhao's foreign military hegemony.
But why isn't the prince the eldest son of King Wuling of Zhao? He was made a prince because his mother was favored by King Wuling of Zhao, who abolished the position of his eldest son Zhang and passed it on to Prince He. King Wuling of Zhao's practice will certainly cause contradictions between father and son and between brothers.
The contradiction between King Wuling of Zhao, King Huiwen of Zhao and Gongzizhang eventually led to the "Dune Palace Chaos", and King Wuling of Zhao always supported Gongzizhang during the coup. Therefore, after Zhao Huiwen's supporters killed childe Zhang, Zhao Wuling must be removed.
References:
Baidu Encyclopedia-Zhao Wuling Wang