「明查暗訪 / 明察暗訪」

(pos:動詞)
<explanation>
yue:表面上公開調查，暗中又另有訪問搜查
eng:to investigate, openly and secretly
<eg>
yue:就住中國啲黑心食品，佢已經明查暗訪咗三年。 (zau6 zyu6 zung1 gwok3 di1 haak1 sam1 sik6 ban2, keoi5 ji5 ging1 ming4 caa4 am3 fong2 zo2 saam1 nin4.)
eng:He has been investigating, openly and secretly, the adulterated, tainted food in China for three years.
<eg>
yue:戰亂之後，佢明查暗訪，希望揾返失散咗嘅太太。 (zin3 lyun6 zi1 hau6, keoi5 ming4 caa4 am3 fong2, hei1 mong6 wan2 faan1 sat1 saan3 zo2 ge3 taai3 taai2.)
eng:After the war, he observed openly and investigated secretly, hoping that he could find his lost wife.