Once upon a time, in a busy town, a man came and opened a strange shop here. Because there is only one thing in it-a priceless jewel, a sign is hung at the door of the store, which reads: "5000 yuan for beggars, 500,000 yuan for civilians, 5 million yuan for businessmen, 50 million yuan for millionaires and 500 million yuan for multimillionaires."

After a long time, no one came to buy this jewelry. The story reached the ears of a millionaire, who wanted to see the jewel and came to this town. He almost fainted when he saw the price. He said angrily to the shopkeeper, "No one does business like you." The shopkeeper said calmly, "The same thing costs different people." The rich man left thoughtfully.

After a long time, no one bought it.

After several years, no one can buy it.

About 40 years later, an old man dressed in gorgeous clothes came to the store with a trembling voice: "I want to buy this jewelry now." He took out a lot of money, even more than 500 million. And he was the rich man of the year.