Why did Wang Dashan commit suicide by taking poison because he didn't recognize all the uncommon words?

As a scholar, Wang Dashan is a learned man, so he didn't do anything that he couldn't see the light, let alone those despicable things. Wang Dashan, because he didn't know all the uncommon words, committed suicide by taking poison because of Judy, the prince of Yan.

When Judy just ascended the throne, Judy thought that his throne was not directly inherited from Zhu Yuanzhang, but stolen from his nephew Zhu Yunwen, so he thought it would be laughed at by everyone, so he decided that in order to make his throne more reasonable, he had to find someone to write himself an imperial edict to cover up his usurpation of power.

At first, Judy was looking for Fang Xiaoru, because Fang Xiaoru, as a Confucian scholar in the DPRK, was naturally the most suitable candidate, but Fang Xiaoru's character was very correct. He thinks he is the zodiac of Zhu Yunwen, and he also thinks that Judy's usurpation of power is very shameful, so he didn't help Judy write the imperial edict of succession, but also scolded Judy. Finally, Judy became angry from embarrassment and killed the Fang Xiaoru family.

After Fang Xiaoru's death, he had to write the imperial edict of succession. At this time, Wang Dashan offered to help him write this imperial edict. After Wang Dashan wrote the imperial edict, Judy thought that this Wang Dashan could betray himself before, and then he might betray himself in the future, so he didn't have Rainbow Mountain and wanted to find a chance to get rid of him, so that he wouldn't forget the future trouble.

So what happened later was to find ten uncommon words for Wang Dashan to recognize, but Wang Da only recognized eight words for his kindness and modesty, and then Judy's words made him understand. In fact, Judy, the prince of Yan, took out uncommon words for Wang Dashan to recognize, not for Wang Dashan to recognize, but to show that he hated Wang Dashan now, so he committed suicide by taking poison after returning home.