act without justification
Chinese idiom, Pinyin is B ī ngch ū w ú m í ng, which means that there is no justifiable reason for sending troops, and generally refers to acting without justifiable reason. The same "no name for a teacher" comes from the book of the Han Dynasty.
The origin of Idioms
"Gaodi Ji" in Hanshu: "an unknown soldier can't cause an accident."
Idiom usage
In the past, red eyebrows and yellow scarves were against the universe, so once the losers were in chaos, they would gather together. Biography of shile in the book of Jin
act without justification
know yourself as well as the enemy - zhī bǐ zhī jǐ
bemoan the state of the universe and pity the fate of mankind - bēi tiān mǐn rén
like fans being out of use after autumn - qiū fēng wán shàn
the dripping dripping water freezes - dī shuǐ chéng bīng