The two bars of the New Coronavirus Self-Test Kit, one dark and one light, indicate a positive test for New Coronavirus, which indicates the possible presence of New Coronavirus antigen and cannot be used as the sole criterion for New Coronavirus infection. The new coronavirus self-test kit usually refers to the new coronavirus antigen test kit, which is mainly used for in vitro qualitative detection of the new coronavirus antigen in nasal swab samples. It uses a double-antibody sandwich method, in which the test card is coated with a new coronavirus antibody immobilized in the detection zone (T) and a goat anti-mouse antibody immobilized in the quality control zone (C), and labeled with a new coronavirus antibody-colloidal gold particles in the conjugate pad. When two red bands appear on the test card, one in the T zone and the other in the C zone, the color of the band in the T zone may be darker or lighter, it is a positive result; when only a red band appears in the C zone and no band appears in the T zone, it is a negative result; if there is no red band in the C zone, regardless of whether the band appears in the T zone or not, it indicates that the test result is invalid. It should be noted that this product cannot be used alone for the diagnosis of neocoronavirus infection. A positive result only indicates the possible presence of neocoronavirus-specific antigens in the sample, and a negative result does not exclude neocoronavirus infection. When two bars appear in the Neocoronavirus self-test kit, you can go to the hospital for a Neocoronavirus nucleic acid test for a definitive diagnosis.