a gross fabrication
Xiang Bi is a Chinese idiom. The Pinyin is Xi à NGB à x à g à u, which means Xiang Bi, facing the wall. That is, facing the wall, made out of thin air. Metaphor is not based on facts. It comes from preface of Shuowen Jiezi.
The origin of Idioms
The preface of Shuowen Jiezi written by Xu Shen of Han Dynasty: "the common people are not Zi. They think that they are curious, so they are more cunning. They make up unknown books in the countryside, and they often act in disorder to shine on the world."
Analysis of Idioms
Synonym: fictitious to the wall and fictitious to the face
Idiom usage
As predicate, object and attribute, it refers to imagination and fabrication
Examples
It seems that there is a reason for it, and it is reasonable to say so. On Yan Fu's salvation
a gross fabrication
Tao and Yi belong to each other - dào jìn xiāng shǔ
reckless and dissipated in behavior and speech - fàng dàn fēng liú
one 's heart ached as if pierced by ten thousand arrows - luàn jiàn cuán xīn
There is not enough success, but more failure - chéng shì bù zú,bài shì yǒu yú
share enjoyment with those having similar tastes - gōng zhū tóng hào
draw from one to make good the deficits of another - yì bǐ zhù zī