Rafters
Chinese idiom, Pinyin is g é w ū Cu ā NCHU á n, which means a metaphor for something that can't be done and beyond one's ability. From yuan Qiaoji's marriage of two generations.
The origin of Idioms
Yuan Qiaoji's "marriage of two generations" the first fold: "there is such a flower papaya Chang'an youth, he does not measure the rafters."
Analysis of Idioms
Close synonym: partition rafter
Idiom usage
To act as an object or attributive
Rafters
white mountain and black water -- the landscape of northeast china - bái shān hēi shuǐ
one log cannot prop up a tottering building - dú mù nán zhī