What's Liu Bei's joke about going to see Cao Cao?

Why did Cao Cao dare not fly? It is said that once Zhuge Liang, Liu Bei, Sun Quan and Cao Cao were flying together, and they suddenly encountered an emergency and needed to parachute to escape. Only then did I find that there were only three parachute bags left on the plane. Everyone is nervous. At this time, Zhuge Liang shook his feather fan, cleared his throat and said, "Well, the mountain man will jump if he answers a few questions, or jump himself if he can't answer them." Others have no choice but to agree.

Zhuge Liang shook the feather fan again and asked Liu Bei, "How many suns are there in the sky?" Liu Bei thought it was very simple and replied, "One." So I took an umbrella bag and went down. Zhuge Liang asked Sun Quan again, "How many moons are there in the sky?" Sun Quan replied: "One." He also took an umbrella bag and went down. Finally, it was Cao Cao's turn. Zhuge Liang asked, "How many stars are there in the sky?" Cao Cao was puzzled and couldn't answer, so he had to jump himself. Unexpectedly, he jumped into the sea and saved his life. Cao Cao secretly rejoiced.

The second time, when four people met an emergency by plane, they still discussed it in the old way. Zhuge Liang shook his feather fan again and asked Liu Bei, "What was the battle when Zhou Wuwang defeated Zhou Wang?" Liu Bei thought simply and replied, "The Battle of Makino." Zhuge Liang nodded, and Liu Bei took an umbrella bag and went down. Zhuge Liang asked Sun Quan again, "How many people died in that battle?" Sun Quan thought for a moment and said, "About 30,000 to 40,000." Zhuge Liang nodded, and Sun Quan took an umbrella bag and went down. Cao Cao couldn't help laughing and thinking, "Zhuge Liang, I know everything from ancient times to the present, especially the military." You fell this time. " Zhuge Liang asked, "What's the name of the soldier?" Cao Cao almost fainted when he heard this, so he had to jump himself. Unexpectedly, he jumped into the sea again and saved his life. Cao Cao laughed to himself.

The third time, the same four people flew, and the plane was in an emergency. As soon as Cao Cao thought about it, Zhuge Raul tried to fool me again, so I jumped myself to avoid being insulted. So he jumped into the air at high speed and heard Zhuge Liang shout to him, "Meng De, there are four parachutes on the plane today."