There are too many, just to name two, Cao Cao. The Northern Song Dynasty believed that Wei was the orthodoxy of China, so naturally Cao Cao was a great leader and a hero. The Southern Song Dynasty believed that Shu Han was the orthodoxy, so Cao Cao naturally became a traitor to the country. Both of them The author himself can figure out the reason for the contrast. Now, because the time is so far away, we call him a famous writer and military strategist in the history of our country; France’s Joan of Arc, an ordinary girl from the countryside has been in England and France for hundreds of years. During the war, she became the hero who rescued the siege of Orleans and fought the bloody battle in Paris. However, after Joan of Arc was arrested, the King of France refused to redeem her, so Joan of Arc was tried by the British Church Court and sentenced to be burned at the stake in the name of a witch. After Joan of Arc's death, She had always been notorious as a bearer of heresy, and it was not until 25 years later that the Pope vindicated her and made her a saint. There is also Yuan Chonghuan, a famous general in the late Ming Dynasty. He was once a nightmare for the Qing army to attack the Ming Dynasty. However, he was later cut into pieces by the Qing court as a means of alienation. The people at that time still ate his flesh and cursed him. . . . It was not until Emperor Qianlong vindicated him a hundred years later that Yuan Chonghuan was revered as a national hero. The same characters include Genghis Khan and so on.

There are many reasons for this. One is the historical judgment perspective influenced by the era in which we live, and the other is the background of judging the changes of the times. For example, it was the Southern Song Dynasty at that time, and today it is Greater China. Political influence, such as mutual hostility, or slandering the previous dynasty (this has happened in all dynasties), etc.