Person A to Person B: “See that piece of shit? If you eat it I’ll give you 100 million yuan.”
Person B eats the shit.
But Person A doesn’t want to give him 100 million yuan.Â He says to Person B: “How about I eat shit too? Then we’ll be even.”
Person B agrees.
Person A eats some shit. “Now we’re even,” he says.
They have just increased GDP by 200 million yuan.