Correct
买椟还珠
/ mǎi dú huán zhū /
Strokes
Definition
to buy a wooden box and return the pearls inside/to show poor judgment (idiom)
Example
Definition
buy the case but return the pearls (in it); buy casket without the jewels; keep the glittering casket and give back the pearls to the seller—make the wrong choice; show lack of sound judgement