The reason is that this sentence in this book means insulting Kangxi. The original text said that "the emperor is worthless at all". This is not to say that Kangxi's value is not great, thus denying Kangxi's achievements in disguise. Then, as a son, Yongzheng can not be angry when he sees this sentence? After reading it, Yongzheng decisively ordered a thorough investigation and arrested the author of this book.

Yongzheng later caught the author of this book. He is the king. Of course, in the face of Yongzheng's anger, he naturally did not escape. Not only was he beheaded, but even his family was implicated to some extent. This shows that insulting the emperor is not a very wise thing, even if the other party is the last emperor.

And it can be seen from this book that Nian Gengyao has long been rebellious. Otherwise, he could not have such books insulting the emperor at home. After all, this is a heinous thing. At the same time, we can also see how courageous Nian Gengyao was at that time, who dared to let people openly write such a book for him and put it at home aboveboard. It can be seen that there are still some statements about his death, not that Yongzheng simply wronged him.

Therefore, we can also get a truth from the case of Nian Gengyao, that is, when you are a detainee, you must have the consciousness of being a detainee, don't think beyond those who have nothing, and even if you have this idea, you must put it out in time. Don't leave any evidence of rebellion at home. It's enough to be an obedient servant and live longer.