Traduction :
open enquiries and secret search (idiom); to investigate openly and in secret; taking information from all sides
Référence :
从明里细心察看，从暗里询问了解。指用各种方法朝廷调查研究。
Origine :
清·吴趼人《痛史》第十一回：“我住在此处，徒占一席，于事无济，倒不如仍然到外面去，明察暗访。”
Annotation :
明察暗访1
1. míngcháànfǎng :
[EN] open enquiries and secret search (idiom); to investigate openly and in secret; taking information from all sides
