In the Battle of Red Cliff, Sun Quan and Liu Bei are fighting against Cao Cao's 800,000-strong army, and there is a huge difference between the two armies. Zhou Yu and Zhuge Liang decide to use a fire plan against Cao Cao. After Huang Gai's bitter meat plan and Pang Tong's chain of plans, they prepared to implement a fire attack to defeat Cao Cao's army, but it was the middle of winter and there was no southeast wind, so the fire plan could not be implemented. Zhuge Liang said that he could borrow the east wind to help the fire plan succeed. So on the night of the general attack, Zhuge Liang succeeded in borrowing the east wind at the altar and the fire attack was effective, defeating Cao's army.