Attack with a clear drum
The source of the idiom: "advanced in the Analects of Confucius": "it's not my apprentice, but the boy's attack."
Chinese PinYin : míng gǔ ér gōng zhī
Attack with a clear drum
impossible to guard against. fáng bù shèng fáng
Water without source, wood without root. wú yuán zhī shuǐ,wú běn zhī mù
not to distinguish black from white. zào bái bù fēn