白纸写黑字 (白紙寫黑字) bái zhǐ xiě hēi zì

bái zhǐ xiě hēi zì set phrase to write black characters on white paper
Domain: Common Saying 俗语 , Subdomain: , Concept:
Notes: A simile for writing down the details of a matter clearly so that there is no misunderstanding (Suyu. p. 22)