明槍好躲，暗箭難防 [－枪－－－－－难－]

Jyutping ming4 coeng1 hou2 do2 , am3 zin3 naan4 fong4
Pinyin míng qiāng hǎo duǒ , àn jiàn nán fáng

Definitions (CC-CEDICT)
  1. lit. easy to dodge the spear in the open, hard to avoid a stab in the dark (idiom); it is hard to guard against secret conspiracies