How did Zhuge Liang skillfully burn Chibi with the east wind?

In 208 AD, Cao Cao sent more than 654.38+100,000 troops south, with the intention of destroying the last two warlords-Liu Bei and Sun Quan. Sun Liu panicked and finally decided to form an alliance. Pang Tong, who retired from the army, cleverly offered a series of tricks to connect Cao Cao's warships. So Zhuge Liang first used the right place to borrow the grass boat to shoot arrows, and then used the right time to borrow the east wind skillfully. Huang Gai took the opportunity to raise a fire and burn Chibi, burning all Cao Cao's warships and cleverly sealing Huarong Road to Cao Cao, but Guan Yu remembered the old feelings and let him go. Although Cao Cao did not die, he lost his spirit and destroyed the elite. In 2008, Cao Cao invaded the south with 1 10,000 yuan, intending to sweep it away. Sun Liu panicked and finally decided to form an alliance. Pang Tong, who retired from the army, cleverly offered a series of tricks to connect Cao Cao's warships. So Zhuge Liang first used the local grass boat to shoot arrows, and then used the timing machine to borrow the east wind. Huang Gai took the opportunity to raise a fire, set fire to Chibi, burned all Cao Cao's warships, and skillfully sealed Huarong Road for Cao Cao, but Guan Yu was released because of old feelings. Although Cao Cao did not die, he lost his spirit and destroyed his elite, and the trend of tripartite confrontation was realized.