明察暗访 míng chá àn fǎng

DEFINITIONS

  1. open enquiries and secret search (idiom); to investigate openly and in secret
  2. taking information from all sides

CHARACTERS

明 míng bright, light, brilliant; clear
察 chá examine, investigate; notice
暗 àn dark; obscure; in secret, covert
访 fǎng visit; ask, inquire