New crown antigen generally refers to the new crown virus antigen test, first of all, you need to carry out pre-test preparation, and secondly, you also need to carry out sample collection, antigen detection, result interpretation and other steps. 1. Pre-test preparation: Generally, before conducting the new coronavirus antigen test, you need to wash your hands with running water or hand sanitizer, and then carefully study the precautions and methods of use in the instruction manual of the new coronavirus antigen test reagent. In addition, it is necessary to check whether the new coronavirus antigen test reagent is within the expiration date, and whether the related supplies are not defective. 2. Sample collection: Before collecting the sample, the nasal swab package needs to be unpacked, and then the head is tilted back, the nasal swab is inserted into the nostrils for 1~1.5cm, and then rotated 4 times against the nasal cavity, and at the same time the nasal swab needs to be operated on the other side of the nasal cavity. 3. Antigen detection: After collecting the sample, the nasal swab should be placed in the sampling tube, at this time, the swab head needs to be rotated in the preservation liquid for 30 seconds, and then squeeze the head of the test paper through the wall of the test tube for 5 times until the liquid in the sample is squeezed out, and then the swab head should be discarded, and then the liquid in the sampling tube should be dripped into the hole of the test card. 4. Interpretation of the results: If both the C and T areas of the test card show red bands, the test result is positive. If there is no red color in the C area of the test card, the test result is invalid even if there is a red band in the T area. In addition, if a red band appears in the C-zone and the T-zone does not show color, the test result is negative. It is recommended that the Neocoronavirus antigen test should be performed under the guidance of the instruction manual, and there is no need to worry about a negative Neocoronavirus antigen test result, while a positive test result will require nucleic acid testing.