Avian influenza virus (AIV) is a type ofinfluenza A virus and is classified as a class A severe infectious disease bythe World Organization for Animal Health (OIE).According to the differentantigenicity of its outer membrane hemagglutinin (H) and neuraminidase (N)proteins, it can be divided into 16 H subtypes (H1~H16) and 9 N subtypes(N1~N9).Among avian influenza viruses, H5N1, H7N7, and H9N2 can be transmittedto humans, of which H5N1 is highly pathogenic and has a high fatality rate. Avianinfluenza has caused serious unsalable poultry products, caused heavy losses tofarmers, and caused great economic losses to the poultry farming industry.