Idiom pronunciation: jρn wúzúchi, ré n w ú n ré n
Idiom definition: foot red: pure gold, pure gold. There is no pure gold. Metaphor: Nothing is perfect. It is also a metaphor that you can't ask a person to be free from faults and mistakes.
The idiom comes from Dai Song Fugu's "Lucky Star": "Gold has no color, but white jade has slight defects. I am not prepared for help, I wish the old gentleman a family. " There are no perfect people in the world, and gold is not all red. People always have shortcomings and advantages.