Antigen testing is generally referred to as the New Crown Pneumonia Antigen Test. In general, a light color in the c-zone of the antigen is likely to be normal. The presence of color in the C zone during antigen testing indicates that the test paper used has begun to react with the nasal or throat swab sample collected, indicating that this antigen test went well. A positive result is indicated by the presence of both the lines of c and t. Regardless of the color of the line at position c, it indicates a positive result, and further nucleic acid testing needs to be done immediately by contacting the relevant department or agency according to local immunization regulations. If there is only a line at c but no line at t, the result is negative, and it is normal for the line at c to be lighter in color. If you are unable to confirm the results of the test, it is recommended that you contact your community to explain the situation and have the antigen tested under the guidance of a professional. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.