不知就里 bù zhī jiù lǐ

DEFINITIONS

  1. unaware of the inner workings
  2. naive
  3. unwitting

CHARACTERS

不 bù no, not; un-; negative prefix
知 zhī know, perceive, comprehend
就 jiù just, simply; to come, go to; to approach, near
里 lǐ unit of distance; village; lane