Delport, a jeweler in the eastern Netherlands, sent emails to 4,000 customers to celebrate the anniversary of 10. Among them, 200 envelopes are filled with diamonds, and the rest are filled with zircon that looks like diamonds, but the price is much cheaper. After the email was sent, he began to wait for the praise and thanks of the people he expected.

But every time the postman comes, it brings him disappointment. What happened? Don't you even lose interest in writing thank-you notes when you receive free gems? Waiting left and right, he finally lost his temper, so he began to call some customers and asked, "What's going on?" The result of the inquiry made Delport angry and funny. It turns out that customers have long been tired of sending advertisements in their mailboxes. Most people just throw the mail of a company or a merchant into the trash can. Naturally, the mail containing gems and zircon sent by Delport was also thrown away as "junk mail". After learning this result, Delport said in the local media: "I was so naive that I forgot that people now will never believe this kind of mail again."

Life perception: the first thing that turns a thing into garbage is the human brain-many times, the human brain is no different from a trash can.