No back, no side
It is a Chinese idiom. Pinyin is w ú B è IW ú C è, which means you can't distinguish the person who betrays the tone. From Shi Da Ya Dang.
The origin of Idioms
"Poetry · Daya · Dang" says: "when you are not aware of it, you have no back and no side. "I don't know, so I have no company and no Qing." Ma Ruichen explained: "it's a kind of person who doesn't know how to be a villain and a kind person who doesn't know how to be a good person."
No back, no side
to cast out the wicked and cherish the virtuous - jié zhuó yáng qīng
a braggadocio , miscalculating his strength , conceived the vain ambition of overtaking the fleeting rays of the sun - kuā fù zhú rì