This year's plan is to continue the conservation and breeding work of the established economical shrimp bank, and improve the growth and excellent characteristics of economical shrimp through the selection and breeding method. The work items include: 1. Preservation of the seed generation and stress tolerance assessment of seedlings; 2. Preservation of seed growth and environmental tolerance selection; 3. Establishment of genetically assisted selection marker (MAS) technology for breeding selection. The expected benefit of this painting is to select and breed excellent domestic economical shrimp strains, and to promote high-quality SPF shrimp and shrimp seedlings for the industry to use. Work details: 1. Improve the growth ability and other characteristics of white shrimp, grass shrimp and freshwater long arm prawn through selective breeding. 2. By introducing new populations, it provides an opportunity to improve the survival rate of breeding and increase production capacity. 3. By promoting SPF seedlings to breeding farms in the industry, largescale production of SPF shrimp seedlings can be stocked by fishermen. 4. Establish a strain with characteristics. 5. Establish markers for genetically assisted selection (MAS) technology for breeding selection. 6. Establish a strain identification platform to conduct species identification.