Zhou Yu made Sun Quan promise to marry Liu Bei, so that Liu Bei could get married here, which could trap Liu Bei, but Zhuge Liang did not expect to see through Zhou Yu's plan and let Liu Bei play along. Finally, Liu Bei not only completed the engagement, but also fled Soochow with the help of Sun Quan's sister. Zhou Yu didn't expect his plan to fail. He was ambushed by the enemy during the pursuit, and was beaten out of the water, almost in flight.
Zhou Yu had to be defeated and flee, but Zhuge Liang did not let Zhou Yu go, and let the soldiers shout together: "Zhou Lang's clever plan is to protect the world, losing his wife and losing his soldiers." Zhou Yu was so angry that even the wound cracked. This is the origin of the allusion to the loss of his wife and soldiers. However, there are still many classic strategies in the Three Kingdoms. If you are interested, you can find out for yourself.
I think Zhou Yu lost his wife and soldiers because he was too greedy. Although he wanted to beat the other side, he was a little eager for quick success and instant benefit, which eventually led to his defeat to the other side. This story tells us that we should not rush, otherwise the final result will only get twice the result with half the effort.