The collection code normally displays the nucleic acid code in green. The green sampling code represents a healthy state that has been verified by the national government service platform’s epidemic prevention data and has no abnormality. The yellow sampling code represents a health status that has been verified by the national government service platform’s epidemic prevention data and shows no abnormalities, but the on-site temperature measurement is abnormal. The red sampling code represents the health status of confirmed and suspected cases verified by the national government service platform’s epidemic prevention data. Nucleic acid sampling codes generally come in three colors: red, yellow, and green.