Zhu Yuanzhang gave them dukes when he rewarded them. In order to win the hearts and minds of the people, their titles can still be hereditary. In other words, as long as there are no major changes, their descendants can inherit the title and enjoy the glory and wealth. If this is the case, why did only Xu Da's title pass until the fall of the Ming Dynasty?
Although the other five dukes were prominent at the time of the award, because their power was very large, Zhu Yuanzhang was more jealous of them, so he found reasons to deprive them of their titles one by one, or abolished the right of their descendants to inherit the titles. After all, the emperor had the power to give knighthoods at will, and he had the right to take them back. As long as you find the right reason, it's incredibly simple.
The reason why Xu Da's title has been retained is because Xu Da's luck is better, plus he double business online. First of all, Xu Da began to follow Zhu Yuanzhang very early. For Zhu Yuanzhang, Xu Da can be said to know the roots. Zhu Yuanzhang knew that Xu Da had no intention of rebellion, so he was not too wary of him.
Moreover, the three views of the two of them are very consistent, so Zhu Yuanzhang is not worried that Xu Da will oppose him. And Xu Da has nothing to blame. No matter what order Zhu Yuanzhang issued, he would resolutely carry it out. He never asked for a reason, but only did what the emperor had instructed. In addition, he did not love money, did not mistreat the people, although the merit was great, but there was no pride, and he had been selflessly dedicated to the country.
According to historical records, when ordered to come out, successfully and triumphantly, not recklessly, women have nothing to love, treasures have nothing to take, Zhongzheng has no flaws, it is clear that the sun and the moon are clear, and the great general is only one.
Therefore, if Zhu Yuanzhang forcibly convicted Xu Da, there would definitely be many people who would oppose it.
Xu Da's emotional intelligence is very high. He knew that Zhu Yuanzhang was jealous of these heroes, so he never did anything that exceeded the rules, the others were eager to hold the military power in their own hands, and Xu Da directly handed over the soldier's charm to Zhu Yuanzhang after the battle, it seemed that it was not a soldier's charm that could command thousands of troops, but a hot potato, and Xu Da's courtesy allowed him to pick up a life.
However, Xu Da's eldest son, Xu Huizu, was not very clever, and when Ming Chengzu Zhu Di had already seized the imperial power, he still went his own way and did not greet him.
This kind of behavior is not actually called integrity, but stupidity. Because of Xu Huizu's special status, he was not executed, but imprisoned. However, his title was certainly not preserved.
If the eldest son Xu Huizu's behavior was to push the Xu family into the fire pit, then the fourth son Xu Zengshou successfully saved the Xu family.
When Emperor Jianwen was still in power, Xu Zengshou had always supported Zhu Di, and was finally killed. After Zhu Di knew about this incident, his heart was very sad, so after Xu Zengshou's death, he specially posthumously sealed him, hoping to commemorate his spirit in heaven in this way, because there was also Xu Zengshou's merits, plus Xu Da's relationship, so the Duke of Xu family has been there.