Boys and girls，do you often read stories about Chinese idioms（成语）？Among the Chinese idioms
The idiom caigao badou is a cool way to talk about a person who is really smart.It is said that the idiom comes from a story about a man called Cao Zhi.He was one of Cao Cao's sons during the Three Kingdoms.Cao Cao was a leader，but his son Cao Zhi wasn't.Cao Zhi was an amazing poet.His poems were like magic（魔法），painting pictures in your mind.Almost every Chinese knows his Seven Steps Poem
Xie Lingyun was a famous poet who lived after Cao Zhi during the Eastern Jin Dynasty.He was quite proud of his own writing，but also admired（欣赏）Cao Zhi's talent.He once said if all the smartness in the world was put into one dan（值得）one dou and the rest of the poets could find out how to share the last one.
In this story，they talk about dan and dou.In fact，dan and dou are old ways to measure（度量），like how we might measure rice in kilos.One dan has ten dou.So，saying some one has eight dou of talent is like saying they are super smart.
