Rice and shrimp circular breeding base in Yulong Village, Baodun Town, Xinjin District. With its unique conditions and ecological breeding mode, the breeding base makes crayfish grow with the advantages of thin and full shell, tender meat and chewiness. Once listed, it became a hot-selling product and was loved by the majority of foodies. Before feeding crayfish, the pond should be thoroughly cleaned and disinfected, and the water in the pond should be completely drained 20-305 days before the shrimps are put into the pond, and the excess sludge should be removed and dried.