1.(lit.) the person from Zheng 郑[zhèng] who wanted to buy shoes (an allusion to an ancient story about somebody who, when buying a pair of shoes, preferred to rely on their foot measurements rather than just trying them on) (idiom)2.(fig.) disregarding the sensible approach in favor of adherence to a fixed idea
1.lit. don't tie your shoelaces in a melon patch, and don't adjust your hat under a plum tree (idiom)2.fig. don't do anything that might arouse suspicion3.innocent acts may be misconstrued