rén
bù
kě
mào
xiàng
1
you can't judge a person by appearance (idiom)
2
you can't judge a book by its cover
3
often in combination 人不可貌相,海水不可斗量[ren2 bu4 ke3 mao4 xiang4 , hai3 shui3 bu4 ke3 dou3 liang2]