Is the Battle of Chibi in the Romance of the Three Kingdoms real?

Yes

The Zhuge Jiefeng in the novel was fictionalized by Luo Guanzhong to show Zhuge Liang’s wisdom. The burning of Red Cliff did indeed happen, and Zhuge Liang did have credit. He was not borrowing Instead of predicting the east wind, he accurately predicted the emergence of the east wind. He knew astronomy and geography at that time. It was the turn of the seasons. Zhuge Liang accurately predicted the time of the east wind like a weather forecast, so that Zhou Yu could seize the opportunity to burn Red Cliff and promote the success of the war.