There is a joke about two economics students.

Two economics students were walking on the road and saw a lump of shit on the side of the road. A said to B: You eat this shit and I'll give you 50 million. B didn't hesitate to eat this shit for money, and A readily gave B a check for 50 million.

They walked on, but they all had a knot in their hearts. On second thought, he ate a lump of shit, so I gave him 50 million, which was really not worth it. B thought, I ate a lump of shit and got 50 million. It's really not worth it.

Suddenly, another piece of shit appeared on the roadside. So B retaliated against A and said, You eat this shit, and I'll pay you back 50 million. Seeing the opportunity to make up for the loss, A ate shit without hesitation.

But when they looked back, they felt that something was wrong: they got nothing, but one of them ate a lump of shit. So they told it to their economics tutor.

The instructor shouted excitedly: Oh, my God! Do you know that?/You know what? What did you just do!

Two students said regretfully that one of us ate a lump of shit.

The tutor immediately interrupted them: no! In the blink of an eye, you have created a billion GDP, a miracle! This kind of experience will be popularized throughout the country, can a well-off society be far behind?

Soon, the authorities announced that China had basically achieved a well-off life. Economics professors have also successfully entered the ranks of national academicians.