The black magpie is a metaphor for hesitant talents (people who don’t know who should seek refuge with better talents). At that time, the south was Wu, and Cao Cao used this to explain that the talents in the south should hurry up and come to me, because there are no more talents in the south for you. He also hopes that knowledgeable people from other places can come and join him so that he can realize his dream of unifying the world. Cao Cao wrote "The crow flies south" in the short song line actually elicited the following rhetorical question, expressing the good bird The thought of choosing a tree to live in reveals one’s talent-loving side