Liu Zhang was the second son of Liu Fei, the King of Qi. In the early days of Lü Hou's reign, Liu Fei, the King of Qi, entered the capital and was almost killed by Lü Hou, and later ceded Chengyang County to Princess Lu Yuan to escape with his life; later, Lü Hou made Lü Tai the King of Lü and Liu Ze the King of Langya, both of which were cut off from qi counties as food, and Liu Zhang was always indignant about this.
Because Liu Zhang was a disciple of the clan, he was summoned to Chang'an to serve as an officer in the imperial forest army, and because Liu Zhang was handsome in appearance and quick wit, he quickly pleased Lü Hou, conferred the title of Marquis of Zhu Xuan, and married Lü Lu's daughter. Liu Zhang knew that Lü Hou's marriage to Liu Lu had ulterior motives, but he still deliberately warmed up with Lü's girls, and the couple loved each other.
In 182 BC, once Lü Hou feasted on his relatives, most of them were princes of the Lü clan or their relatives, and Liu Zhang also entered the palace to serve; Lü Hou appointed Liu Zhang as a liquor official, supervising the wine, and punishing those who did not drink. Before the banquet began, Liu Zhang asked Lü Hou: After the general of the chancellor, he was now ordered to supervise the wine, and he would use military law to drink wine, and ask the empress dowager for permission. Lü Hou was on his head at this time, and naturally agreed.
The banquet began, singing and dancing, and Liu Zhang also danced to help him, and He leaned forward and backward after Le Delu. When the wine was in full swing, Liu Zhang asked again: The subject please talk about farming for the empress. Lü Hou smiled and said, "Your father may still know about farming, but you were a prince and nobleman as soon as you were born, how could you know?" Liu Zhang said: The minister also knows a thing or two. Lü Hou said: Then you will talk about it.
So Liu Zhang quoted and sang: Deep ploughing of the seeds, the seedlings want to be sparse, and those who are not their seeds, hoe and go away. Hearing the last two sentences, Lü Hou suddenly retracted, silent, she naturally heard Liu Zhang's voice, but it was inconvenient to have a seizure, Liu Zhang also pretended to be improvised, returned to his seat and then drank.
At this time, Liu Zhang had been in Chang'an for six or seven years, which was also the first time he borrowed the phrase "those who are not of his kind, hoe away" to imply to everyone that he had the determination to eradicate Zhu Lu.
After that, Liu Zhang deliberately drunk several lü clan disciples in order to make another amazing move to shake the Lü clan. Soon the opportunity appeared, a young man of the Lü clan was drunk, left the table, stumbled out, Liu Zhang immediately caught up with his sword, and the sword fell in his hand, and the young man's blood splashed on the spot. After that, Liu Zhang returned to Lü Hou's seat, saluted with military salutes, and said: According to military law, the subject has beheaded a person who escaped from the table drunk, and specially reported to the empress. At this time, everyone in the hall was stunned, and the wine was awakened, looking at Lü Hou sitting in the hall, they all secretly speculated in their stomachs about what Lü Hou was going to do with Liu Zhang.
Lü Hou was stunned for a while, killing the Lü family's children, how could she not be angry? However, drinking alcohol according to military law was also what she had just allowed herself, and now she was in a dilemma, And Lü Hou looked at the young man standing in front of her, and for the first time she realized that she had looked at the wrong person, and this son was likely to become an extremely dangerous enemy; Lü Hou was shocked and angry, glared at Liu Zhang fiercely, and gritted his teeth and said: Strike the banquet.
Liu Zhang's move was definitely a great encouragement to the sons of the Liu clan in the middle of the dynasty at that time and the ministers who had their hearts set on liu, who saw the hope of Liu Zhang's revival from Liu Zhang, the Marquis of Zhu, so the Liu clan's forces were more united and stronger.