Edison took Gina to the edge of the fish pond and asked her, "How much do you think these fish can be sold for?" There are hundreds of a fish, and maybe thousands of fish. Edison was almost sitting on the edge of the fish pond and counting money. "I don't understand, but I know that no matter what you do, Edison, you can make a lot of money." In Gina's eyes, Edison is omnipotent. "I have an idea now. I’ve been reading for the past few days. The book says that there’s a system called recirculating system. Fish stocks are reared in a series of interconnected tanks that are indoors. Wouldn’t that be amazing? When I make money, I will set up the system and raise more fish." Edison believes that after using powder to farm the fish, such a delicious fish can be sold for a good money. The imp