attack one 's own side
As a Chinese idiom, Pinyin is f ǎ ng ē Xi ā ngxi à ng, which means turning weapons and opposing each other; it refers to helping the enemy to oppose themselves. From the book of history, Wu Cheng.
Idiom explanation
Ge: ancient weapons; Xiang: facing. To turn weapons against one another is to help the enemy against himself
The origin of Idioms
"Shangshu · Wucheng" said: "move forward, attack to the north of the back."
attack one 's own side
What you say comes with what you say - yán chū huò suí
a place where all kinds of people live - wǔ fāng zá chǔ
bamboo shoots after a spring rain - yǔ hòu chūn sǔn
Grinding teeth and chiseling teeth - mó yá záo chǐ
Riding Cao does not remember horse - qí cáo bù jì mǎ