Because history is written by winners, many things have been changed. Dumas once said a famous saying, "As long as you can give birth to a child, you have the right to rape history." Personal understanding can also be expressed as follows: "As long as you have the right to speak, you can change the historical record in a certain period and to a certain extent", but you can't change the historical facts forever.
I remember an American (who seems to be the president) said, "You can deceive all people for a period of time, or you can deceive some people all the time, but you can't deceive all people all the time."
So when reading history books, you should have your own thoughts, not what you believe, but your own independent thoughts. I don't know who said, "Reading a history book depends not only on what it says, but also on what it doesn't say."
This "nothing said" is my understanding that "it didn't really happen, but it did happen, just because of some unknown or ulterior purpose, so I can't say it." Therefore, we need to try our best to find out the reasons why we can't say it when reading a book.
Therefore, this requires artistry. Without the artistry of thinking in this respect, it is difficult to understand the true colors and true colors in history.