Have the funds to prepare. Be mentally prepared. The cost is about 5,000 yuan per mu in the first year, and more than 0.000 yuan per mu 1000 yuan per year thereafter. With technical support, the profit of each backup will be around 5,000 from the second year. In the first year, because of the unstable output and large investment, there was no money to earn. The market prospect is hot. The market will not be saturated for at least fifteen years. There is still room for the price of crayfish to rise. It will continue to rise for at least the next five years.