秉筆直書 [－笔－书]

Jyutping bing2 bat1 zik6 syu1
Pinyin bǐng bǐ zhí shū

Definitions (CC-CEDICT)
  1. to record faithfully
Definitions (Wiktionary)
  1. phrase, idiomatic
    to write the truth without fear or favor; to record faithfully