The implication of "buying gifts and returning pearls"
Zheng only stared at the beautiful box, but lost the really valuable pearl. Tell us to prioritize everything we do, or we will do this stupid thing of Zheng Nan buying gifts and returning pearls. We all know that we can't judge a book by its cover, but many times, we are still confused by the appearance of things.
Just like the man in the Zheng family, he only stared at the exquisite box, but ignored the really valuable "jewelry". So do people.