Genetic testing refers to a method that collects blood, other body fluids, or cells, etc., and uses specific equipment to detect and analyze the molecular information of the subject’s DNA. Genetic testing can diagnose disease and can also be used to predict disease risk. In addition, in judicial forensic evidence identification, individual identification, paternity testing, race and species identification, etc., also need to use the theory and technology of DNA testing to make judgments. Therefore, in genetic testing sampling, disposable sampling swabs with extremely high collection and release volumes, as well as saliva collectors with no sense of intrusion and easier sampling, have become the preferred sampling tools in genetic testing and forensic identification.