A fish is second-hand, so it is very cheap. Yiyu is a trading platform for second-hand products. There are many second-hand ones, and there are many new ones. The system will judge the level of things according to the old and new products. Is the nature of a fish software itself, used to buy and sell second-hand products. No matter what it is, as long as it is hung for sale, its price is definitely cheaper than the original price.