A businessman lost his wallet. There was plenty of money in it. So he made a promise, “If someone finds my wallet and returns it to me. I‟ll give half the money to him.” A dustman (清洁工)found the wallet in a dustbin (垃圾箱). He sent it back to the businessman. But the businessman changed his mind. “There was still a diamond ring in my wallet,” said the loser. “I won‟t give half the money in my wallet to you until you return it to me!” They began to quarrel . The businessman refused to do what he had said. The dustman became angry and took him before a judge. After the judge heard what had happened to them, he said to the businessman. “I‟m sure you are an honest man. It‟s true that you have lost a wallet in which there was a diamond ring. But it‟s also clear that there is only a lot of money in this wallet. I don‟t think it‟s yours. Wait for some time. Perhaps someone will be able to return your wallet to you!” Then the judge turned to the dustman and said, “ Take the wallet home. If the loser doesn‟t go to get it back in three days, it will belong to you!”