According to the relevant regulations on epidemic prevention and control, the personnel with health code "yellow code" must conduct two nucleic acid tests within 3 days, and the interval between the two nucleic acid tests must be more than 24 hours. If the 1 test result is negative, the health code will change to "green code" for a short time, and then to "yellow code" again, prompting the second test as required. If the results of two nucleic acid tests are negative, the health code will be officially turned into a "green code".
The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.