Let's start with this so-called color poem. In fact, this poem was not written by Cao Cao, but by Cao Zhi, a famous seven-step poet of Cao Cao's third son.
The background of the poem Ode to a Bronze Quetai is that after Cao Cao defeated Yuan Shao to pacify the north, he dug up a treasure-a peacock cast in bronze-in Yecheng, Yuan Shao's original capital. Because it is considered as a symbol of good luck, Cao Cao ordered the construction of a luxurious palace in Yecheng-Qingtong Quetai.
Cao Zhi is the supervisor of this copper sparrow terrace. In order to please his father, Cao Cao, he wrote this poem "Ode to a Bronze Sparrow". There are two poems: the second bridge connecting things, like shrimp in the sky. And these two sentences were deliberately changed by Zhuge Liang to "take Er Qiao to the southeast and enjoy it with * * *". In order to stimulate Sun Quan and Zhou Yu, it is said that Sun Liu and his family formed an alliance because of a poem.
Of course, I have to explain why Zhuge Liang can make Zhou Yu so angry by changing two poems casually. This is because Er Qiao was the world-famous two beauties named Joe at that time, but Sun Ce's wife, and Xiao Qiao was Zhou Yu's wife. Zhuge Liang knew this but said in front of Zhou Yu that Cao Cao's greatest wish in this life was to hold Er Qiao in his arms. How can Zhou Yu not be angry?
Of course, these are all the reasons mentioned in the novel. In fact, the deeper reason was that Cao Cao had unified the north at that time, and among all the heroes in the world, only Liu Bei and two Sun Quan families were left. Therefore, Sun and Liu have no choice but to jointly deal with Cao.