Lead knife
It is a Chinese idiom, Pinyin is n ú m ǎ Qi ā nd ā o, lead Dao: lead Dao. It means bad horse, bad knife. Metaphor is weak. It comes from the biography of kaixiao in the book of the later Han Dynasty.
The origin of Idioms
Fan Ye of the Southern Song Dynasty wrote in the book of the later Han Dynasty, biography of kaixiao: "in the past, the King Wen was still serving Yin. But you can't help it by force. "
Idiom usage
It refers to mediocrity.
Lead knife
daily increasing and monthly benefiting - rì zēng yuè yì
every house deserves a rank of nobility -- there are wise men everywhere - bǐ wū kě fēng