Zhuge Liang's grass boat can calculate that the river is foggy by borrowing arrows. Why didn't Wu burn Sima Yi to death?

In the Romance of the Three Kingdoms, Zhuge Liang is a resourceful counselor. He predicted that there would be fog on the river in three days, and then borrowed one hundred thousand arrows from Cao Cao. However, just when Sima Yi was burned to death in the valley above, a heavy rain ruined Zhuge Liang's great cause of restoring the Han Dynasty. Cao Wei's ambition was not paid, which brought hope to Sima Yi who was dying. Why did Zhuge Liang predict that there would be fog on the river when he burned Sima Yi, but did not calculate that it would rain?

As far as the literariness of literary works is concerned, the story of Zhuge Liang shooting an arrow with a straw boat happened in the heyday of Liu Bei's power. The author deified Zhuge Liang in order to express that there was a powerful counselor among Liu Bei's forces. Liu Bei was already dead at the time of the Shangfanggu incident, which was the period when the power of Shu and Han declined, and according to history, Sima Yi could not have died here. However, Zhuge Liang's image in The Romance of the Three Kingdoms has always been ingenious, so it can only be said that the heavy rain is an act of God. Sure enough, Zhuge Liang died a month after this incident. Therefore, the author's writing conforms to the real history, and after Zhuge Liang's death, the remaining people in the Three Kingdoms are a new force, and the following examples in The Romance of the Three Kingdoms will be re-launched.

There is no such thing as a straw boat borrowing an arrow in the History of the Three Kingdoms and the real history, but when the valley above is burned and it rains, it does exist. In Romance of the Three Kingdoms, the author wrote that in order to deify Zhuge Liang, he borrowed the arrow of a straw boat, which burned the valley and caused heavy rain, in order to conform to the real historical line. In real history, the valley above the fire will rain, mainly because of the topography of the valley above, also known as "Huludao".

When Zhuge Liang burns Sima Yi, the fire will collide with the air to form hot steam, and the hot steam will form rain when it meets cold air at high altitude. This is modern scientific knowledge. Zhuge Liang knows how to watch the sky at night. He doesn't understand these scientific knowledge at all. Naturally, he didn't expect heavy rain, which extinguished the fire in Shanggu and the hope of success in the Northern Expedition. It can't be said that Zhuge Liang is not clever, because even the current weather forecast is sometimes inaccurate, and the weather changes are uncontrollable due to many factors.

To sum up, Zhuge Liang can predict the fog with the arrow of the straw boat, but he can't predict the heavy rain above the burning valley. Mainly when the author wrote the Romance of the Three Kingdoms, he had to deify Zhuge Liang and take the real historical route, so he could only arrange this "providence" fate for Zhuge Liang. In fact, whether in literary works or in history, Zhuge Liang has a lot to learn. The "one model" in high school textbooks is what we should learn, and we should be loyal to our motherland.