1. Call the nucleic acid testing agency to find out the nucleic acid results. If the result is ok, just wait patiently.
2. If there is any problem with the nucleic acid results, isolation measures should be taken and the nucleic acid should be rechecked according to relevant requirements.
3. If the yellow code is assigned again, the results of previous sampling cannot be used as the basis for turning green, and nucleic acid detection needs to be carried out again.