In order to resolve the crisis at the Hongmen banquet, Liu Bang proposed to marry Xiang Yu's uncle Xiang Bo as a child's family, and the clear-eyed people knew that Liu Bang was using Xiang Bo and was not sincerely married to him. In fact, it was Zhang Er who married Liu Bang to his children, and Zhang Er was originally a remnant who wandered around and had no place to live, but he was very lucky, not only later became a prince of the party, but also married Liu Bang as a child and daughter. So what kind of person is Zhang Er? Why did Liu Bang like him so much?

(1) Zhang Er started by eating soft rice
Talking about Zhang Er, many people may not be familiar with him, in fact, he was the leader of the Zhao State in the last year of the Qin Dynasty, the third anti-Qin base.
Zhang Er was a native of Kaifeng, Henan (Da liang of the ancient Wei state), from a poor family, but very talented, and was a local celebrity. After the fall of the State of Wei, Zhang Er and his good friend Chen Yu fled to the end of the world and moved to minquan (ancient waihuang) in present-day Henan. Qin Shi Huang did not know that Zhang Er was a famous scholar at first, and a few years after the fall of the State of Wei, Qin Shi Huang heard that Zhang Er and Chen Yu were celebrities of the State of Wei, so Qin Shi Huang sent people to hunt them down, but at this time Zhang Er and Chen Yu had already fled to Waihuang. According to historical records, Zhang Er and Chen Yu were good friends of life and death, Zhang Er was much older than Chen Yu, and Chen Yu treated Zhang Er like a father.
After Zhang Er fled to Waihuang, he was not yet married, according to Zhang Er's conditions at that time, marriage was hopeless, after all, he was a wanted criminal arrested by the state, but Zhang Er was a very lucky person.
There is a rich man in Waihuang, his daughter is not happy in marriage, the rich woman is delicate, but her husband is doing nothing, and the rich woman does not want to live a life of blandness. Later, her father's friends introduced Zhang Er to a rich woman, and Zhang Er became a rich man from then on, and Chen Yu married a rich woman like him.
After Zhang Er had money, he did not squander like some upstarts, but made friends all over the world, and soon Zhang Er's reputation was greatly enhanced, and he became the county order of Waihuang County. During this period, Liu Bang heard that Zhang Er's family could eat and drink for free, and he also went to Zhang Er's house to stay overnight, became Zhang Er's doorman, and lived in Zhang Er's house for several months, so Zhang Er and Liu Bang met.
(2) How did Zhang Er go from being a tramp to mastering the real power of zhao guo?
In the first year of Qin II, Chen Sheng and Wu Guang revolted in Dazexiang, and Zhang Er and Chen Yu also responded positively, and Chen Sheng was very happy to see the famous soldiers of the State of Wei come to him, and treated them with courtesy, and Zhang Er and Chen Yu became the great strategists under Chen Sheng.
Later, Chen Sheng sent Zhang Er and Chen Yu to follow Wu Chen to attack Zhao Di, during which Zhang Er met the debater Pu Tong, and with the help of Qu Tong, Zhang Er smoothly took more than fifty cities in Zhao Di, and after Zhao Di took it, Zhang Er supported Wu Chen to claim the title of king in Zhao Di, Zhang Er as the right chancellor, and Chen Yu as a general.
After Wuchen became king, Chen Sheng was very angry, and he wanted to send troops to attack Wuchen, at this time someone admonished him: You can't even defeat the Qin army, do you want to build another enemy for yourself? It would be better to take this opportunity to congratulate the warlord. Chen Sheng acted according to the plan, and at the same time took Wu Chen's family and Zhang Er's son Zhang Ao as hostages in his palace, and then Chen Sheng ordered Wu Chen to march west to destroy Qin.
Zhang Er proposed: You can't attack the State of Qin, Chen Shengfeng you are the King of Zhao is a last resort, once the State of Qin is destroyed, his next goal is you, now it is better to send troops to occupy Hanoi County, Yan Land, dai land, in order to expand their own power, even if the State of Qin is destroyed, Chen Sheng can not do anything to you.
WuChen followed the plan and sent three armies, among which Li Liang attacked Changshan, and after taking Changshan, Wuchen sent him to attack Taiyuan, only to be blocked at Jingxing, at which point he received a letter of persuasion from the Qin general, saying: As long as you surrender to Qin, forgive you for your innocence, and you can also be rich and noble.
Li Liang had already suffered setbacks in Jingxing, and with the temptation of the Qin army, he had the idea of betraying the wuchen, but he still couldn't make up his mind. Just when Li Liang went back to move the rescue troops, he met Wuchen's sister and other people on the road, and was slighted by Wuchen's sister, Li Liang's heart was very unhappy, and he killed Wuchen's sister in anger. Li Liang then led an army directly to attack the capital of the Zhao state, Handan, and killed Wu Chen. Zhang Er and Chen Yu had good interpersonal relations in the Zhao Kingdom, and there were always people who reported to them when things happened, and before Li Liang could kill them, the news of the siege was leaked, and Zhang Er and Chen Yu immediately ran away after they knew about it.
After Wu Chen was killed, Zhang Er and Chen Yu collected remnants of soldiers and re-established the Zhao state regime, zhang Er did not establish himself as king, but found Zhao Xie, the duke of Zhao Guo, and supported him as the king of Zhao, Zhang Er as the chancellor, and Chen Yu as a great general, and they held the power of the Zhao state. In fact, Zhao Wang Xie was just a puppet of Zhang Er and Chen Yuli, and had no power in his hands. Later, Li Liang was not convinced, and led an army to attack Zhang Er and Chen Yu, but the army was defeated and surrendered to Zhang Handan.
(3) Liu Bang appreciated many people, so why did he only meet Zhang Er's son?
In the last years of the Qin Dynasty, there were not only one rebel army in the world, but there were not a few rebel armies in various places. Qin II sent Zhang Handan around to extinguish the fire, and when Zhang Handan defeated Xiang Liang, he felt that the rebel army south of the Yellow River was already insignificant, and he led 200,000 troops north to attack the Zhao state, and the Zhao king fled to Julu in defeat.
After the Zhao army was scattered, Zhao Wang Xie and Zhang Er were trapped in Julu, Chen Yu was stranded outside Julu City, the situation was very critical, Zhang Er wrote many letters to ask Chen Yu to send troops, but was rejected by Chen Yu, after the fiasco of the Zhao army, Chen Yu collected not many remnants, he did not dare to send troops, so Zhang Er and Chen Yu turned against each other.
Later, the King of Chu Huai sent Song Yi and Xiang Yu north to rescue Zhao, Xiang Yu killed the timid Song Yi, and he led his army to fight the Qin army to the death, the rebel army saw the defeat of the Qin army, flocked to help Xiang Yu, and as a result, Zhang Handan's army was defeated and surrendered, and the giant deer was able to break the siege.
After the Battle of Julu, Xiang Yu divided the 18 princes and made Zhang Er the King of Changshan, but Chen Yu only made one marquis, Chen Yu was not convinced, he thought that his merits were not under Zhang Er, why he was crowned king, but he was also a marquis. Therefore, Chen Yu borrowed troops from Tian Rong, who was also dissatisfied with the division, to attack Zhang Er, and as a result, Zhang Er's army was defeated and Changshan Guo was lost.
After the defeat of Zhang Er's army, he originally wanted to go to xiang yu, after all, his own king of Changshan was sealed by Xiang Yu, and he should go to find Xiang Yu, but someone advised Zhang Er to let him turn to Liu Bang, because he had observed the heavens, and Liu Bang could rule the world. Zhang Er had originally had some friendship with Liu Bang before, and when he heard someone say this, he decided to defect to Liu Bang.
Liu Bang was very happy to see Zhang Er come to rely on himself, and he was happy to betroth his daughter Princess Lu Yuan to Zhang Er's son Zhang Ao, why did Liu Bang do this? Didn't he promise to marry Xiang Bo as a child? In fact, Liu Bang admired Zhang Er very much, he had long heard that Zhang Er was a famous scholar in the State of Wei, and he was born as a farmer, and his identity was very different, plus when Xiang Yu was divided into 18 princes, Liu Bang was the king of Han, Zhang Er was the king of Changshan, everyone was the prince of the princes, and they were married as relatives, which was also a door-to-door pair.
Later, Liu Bang sent Han Xin to open up the northern battlefield, and after Han Xin and Zhang Er took zhao guo, Han Xin immediately asked Liu Bang for orders to make Zhang Er the king of Zhao, and Liu Bang agreed without hesitation, and named his relatives the king of Zhao, and Liu Bang was naturally happy. Before Liu Bang ascended the throne and became emperor, he divided up 7 princes with different surnames, and only Zhang Er was willing to divide them. However, King Zhao, who had only been in the service for one year, died of illness, and his son Zhang Ao took the throne.
bibliography:
Historia
Book of Han
Zizhi Tongjian