The red tube is present in the new crown nucleic acid test in order to preserve the specimen with the red color of the liquid in the test tube to avoid protein cleavage of the sample. In the nucleic acid test, after completing the sampling, the medical personnel will break the head of the collector and put it into the red tube, the main significance of which is to protect the collected samples, and to facilitate the preservation of the samples and carry out the transportation through the mixing of the solution with the samples in it. The solution in the red tube is a protein cleavage prevention solution. Soaking the sample in the solution after collection prevents the protein of the sample from being cleaved, thus preventing the sample from becoming invalid. When conducting nucleic acid testing experiments, it is an important part of the whole nucleic acid testing process to be able to provide samples that are still active, thus avoiding invalid results.