A whitewashed crow soon shows black again

Similar sayings:

Crows everywhere are equally black Crows everywhere are equally black
The black dog gets the food; the white dog gets the blame The black dog gets the food; the white dog gets the blame
In every family’s cooking pot is one black spot In every family’s cooking pot is one black spot
You cannot draw white cloth from a dying vat You cannot draw white cloth from a dying vat

Chinese sayings and proverbs