When the wind blows down the red flag, Liu Bei will rob the camp-why?

The novelist wrote it on purpose. This description has been lacking in ancient novels, just to show that some people have foresight. In fact, even if the wind doesn't blow the flag, those counselors can predict the enemy's movements. Writing that the wind blows the broken tooth flag just adds a little fantasy color. It is by no means true that Zhuge Liang is in front of Battle of Red Cliffs, but there are many similar descriptions that make people feel that he has that ability. This is the role of the wind blowing through the tooth flag to pave the way.