閻王好見，小鬼難當 [阎－－见－－－难当]

Jyutping jim4 wong4 hou2 gin3, siu2 gwai2 naan4 dong1
Pinyin yán wáng hǎo jiàn , xiǎo guǐ nán dāng

Definitions (CC-CEDICT)

lit. standing in front of the King of Hell is easy, but smaller devils are difficult to deal with (idiom)