商人到小镇去推销鱼缸,但那里的人没有养观赏鱼的习惯。所以,尽管推销很久,尽管商人的鱼缸工艺精细,造型精巧,依旧无人问津。商人在花鸟市场找了一个卖金鱼的老头,以很低的价格向他订了500尾小金鱼。老头很高兴——他在小镇经营生意多年,生意一直非常惨淡。商人让担着金鱼的老头和他一起来到镇边水渠的上游,说：“把这500尾金鱼全都放进去!”老头不解。商人又说：“你只管放,我一分钱都不会少给你!” The merchant went to the town to sell the fish tank, but the people there did not have the habit of watching fish. Therefore, despite the long-term sales promotion, although the merchant’s fish tank is delicate and delicate in shape, nobody cares about it. The merchant found an old man selling goldfish at the flower and bird market and ordered 500 small goldfish at a very low price. The old man is very happy - he has been in the town for years and his business has been very bleak. The merchant told the old man with goldfish to come with him to the upper reaches of the town’s canal. He said: “Let these 500 goldfish be put in!” The old man was puzzled. The businessman also said: “You just put it, I will not give you a penny!”