Buy the box, but return the pearls.

There is a Chu man who sells jewelry in the state of Zheng. He carved a pearl box with precious Mulan, smoked the box with spices made of cinnamon pepper, decorated it with precious stones and jewels, connected it with beautiful jade, decorated it with jade and connected it with kingfisher feathers. A man from Zheng bought this box, but returned the beads in it to him. It can be said that this jeweler is good at selling boxes, but not good at selling jewelry.