lit. don't tie your shoelaces in a melon patch, and don't adjust your hat under a plum tree (idiom); fig. don't do anything that might arouse suspicion; innocent acts may be misconstrued
trad. 瓜田不納履,李下不整冠
Also written 瓜田不納履,李下不整冠【guā tián bù nà lǚ , lǐ xià bù zhěng guān】