Guā tián bù nà lǚ; lǐ xià bù zhèng guān.*

瓜田不納履, 李下不正冠。

Lit Don't tie your shoes in a melon patch, [and] don't adjust your hat under a plum tree.

Fig Don't engage in any behavior which might appear suspicious.

Topics APPEARANCES BEHAVIOR CONDUCT CONDUCT SUSPICION