The New Crown Antigen Test Kit has two representations, one is C and the other is T. C is the quality control area on the test paper and T is the detection area. If a positive result occurs in both the C and T zones of the New Crown test, it means that the result is positive. If a positive result occurs only in the C zone and not in the T zone, the test is negative. the C zone usually indicates whether the reagent is effective or not. the T zone represents the test result in the detection zone. When using the New Crown Antigen Test Kit, be sure to look at the results shown in the C zone first, and use the reagent only if it is normal. If a positive result appears in zone C, the reagent is a normal reagent. If no result appears in area C, it means that the reagent itself is faulty and cannot be used. On the premise that the C zone appears positive, then look at the results of the T zone, T zone positive means that the nucleic acid test of the new coronavirus is positive, suggesting that there is a new coronavirus infection. If the T-zone is negative, there is no novel coronavirus infection.