The New Crown Antigen Test is detected by an antigen-antibody binding reaction on a test strip, where a certain amount of antibody is encapsulated on the test strip and the antigen is detected by adding a nasal or throat swab sample, as described below: The New Crown Antigen Test detects antigens by an antigen-antibody binding reaction on a test strip, where a certain amount of antibody is encapsulated on the test strip and the antigen is detected by adding a nasal swab sample. It detects a certain amount of antigen, and the sensitivity and specificity of antigen detection is somewhat poorer than that of nucleic acid detection. However, the advantage of antigen detection is that the tester can operate the test on his/her own, and the result can usually be obtained in 15-20 minutes, without the limitation of equipment and space. During an epidemic, antigen testing is a necessary complement to nucleic acid testing, and can help achieve early detection, triage, and treatment of new cases of pneumonia. There is a difference in principle between antigen and nucleic acid testing. Nucleic acid tests the RNA, the genetic material of the new coronavirus, while antigen tests the protein, the outer layer of the new coronavirus. Antigen test can not replace nucleic acid test, at present, China still take nucleic acid test as the gold standard. Tip: “New coronavirus pneumonia and new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.